diff --git a/kalk/src/interpreter.rs b/kalk/src/interpreter.rs
index 4e28d8a..25f4ddd 100644
--- a/kalk/src/interpreter.rs
+++ b/kalk/src/interpreter.rs
@@ -175,8 +175,8 @@ fn eval_unary_expr(
     let num = eval_expr(context, &expr, unit)?;
 
     match op {
-        TokenKind::Minus => Ok(KalkNum::new(-num.value, &num.unit)),
-        TokenKind::Percent => Ok(KalkNum::new(num.value * 0.01, unit)),
+        TokenKind::Minus => Ok(num.mul(context, KalkNum::from(-1f64))),
+        TokenKind::Percent => Ok(num.mul(context, KalkNum::from(0.01f64))),
         TokenKind::Exclamation => Ok(KalkNum::new(
             prelude::special_funcs::factorial(num.value),
             unit,
diff --git a/kalk/src/kalk_num/mod.rs b/kalk/src/kalk_num/mod.rs
index a949e30..75e59b0 100644
--- a/kalk/src/kalk_num/mod.rs
+++ b/kalk/src/kalk_num/mod.rs
@@ -22,9 +22,7 @@ lazy_static! {
         let mut m = HashMap::new();
         m.insert("3.141592", "π");
         m.insert("2.718281", "e");
-        m.insert("6.283185", "tau");
         m.insert("6.283185", "τ");
-        m.insert("1.618033", "phi");
         m.insert("1.618033", "ϕ");
         m.insert("1.414213", "√2");
         // Radian values for common angles
@@ -127,11 +125,32 @@ impl KalkNum {
         }
     }
 
+    pub fn to_string(&self) -> String {
+        let as_str = trim_number_string(&self.to_f64().to_string());
+
+        if self.imaginary_value != 0f64 {
+            let imaginary_as_str = trim_number_string(&self.imaginary_to_f64().to_string());
+            let sign = if self.imaginary_value < 0f64 {
+                "-"
+            } else {
+                "+"
+            };
+
+            format!("{} {} {}i", as_str, sign, imaginary_as_str)
+        } else {
+            as_str
+        }
+    }
+
     pub fn to_string_big(&self) -> String {
-        if self.imaginary_value == 0 {
+        if self.imaginary_value == 0f64 {
             self.value.to_string()
         } else {
-            let sign = if self.imaginary_value < 0 { "-" } else { "+" };
+            let sign = if self.imaginary_value < 0f64 {
+                "-"
+            } else {
+                "+"
+            };
             format!(
                 "{} {} {}",
                 self.value.to_string(),
@@ -141,6 +160,23 @@ impl KalkNum {
         }
     }
 
+    pub fn to_string_real(&self) -> String {
+        trim_number_string(&self.to_f64().to_string())
+    }
+
+    pub fn to_string_imaginary(&self, include_i: bool) -> String {
+        let value = trim_number_string(&self.imaginary_to_f64().to_string());
+        if include_i && value == "1" {
+            String::from("i")
+        } else if include_i && value == "-1" {
+            String::from("-i")
+        } else if include_i {
+            format!("{}i", value)
+        } else {
+            value
+        }
+    }
+
     pub fn to_string_pretty(&self) -> String {
         let sci_notation_real = self.to_scientific_notation(ComplexNumberType::Real);
         let result_str = if (-6..8).contains(&sci_notation_real.exponent) || self.value == 0f64 {
@@ -156,7 +192,7 @@ impl KalkNum {
         {
             self.to_string_imaginary(true)
         } else {
-            format!("{} i", sci_notation_imaginary.to_string())
+            format!("{}", sci_notation_imaginary.to_string())
         };
 
         let mut output = result_str;
@@ -166,13 +202,21 @@ impl KalkNum {
             if output == "0" {
                 output = String::new();
             }
+
+            // If there is a real value as well
             if output.len() > 0 {
                 output.push_str(&format!(
-                    " {} ",
-                    if self.imaginary_value < 0 { "-" } else { "+" }
+                    " {} {}",
+                    if self.imaginary_value < 0f64 {
+                        "-"
+                    } else {
+                        "+"
+                    },
+                    result_str_imaginary.trim_start_matches("-"),
                 ));
+            } else {
+                output.push_str(&format!("{}", result_str_imaginary));
             }
-            output.push_str(&format!("{}", result_str_imaginary));
         }
 
         let unit = self.get_unit();
@@ -238,8 +282,10 @@ impl KalkNum {
 
     pub(crate) fn mul(self, context: &mut crate::interpreter::Context, rhs: KalkNum) -> KalkNum {
         let right = calculate_unit(context, &self, rhs.clone()).unwrap_or(rhs);
+        // (a + bi)(c + di) = ac + adi + bci + bdi²
         KalkNum::new_with_imaginary(
-            KalkNum::default().value,
+            self.value.clone() * right.value.clone()
+                - self.imaginary_value.clone() * right.imaginary_value.clone(),
             &right.unit,
             self.value * right.imaginary_value + self.imaginary_value * right.value,
         )
@@ -349,6 +395,17 @@ impl KalkNum {
     }
 }
 
+fn trim_number_string(input: &str) -> String {
+    if input.contains(".") {
+        input
+            .trim_end_matches('0')
+            .trim_end_matches('.')
+            .to_string()
+    } else {
+        input.into()
+    }
+}
+
 fn calculate_unit(
     context: &mut crate::interpreter::Context,
     left: &KalkNum,
diff --git a/kalk/src/kalk_num/regular.rs b/kalk/src/kalk_num/regular.rs
index fcabaaa..3cb803a 100644
--- a/kalk/src/kalk_num/regular.rs
+++ b/kalk/src/kalk_num/regular.rs
@@ -32,21 +32,18 @@ impl KalkNum {
         self.value
     }
 
+    #[wasm_bindgen(js_name = getImaginaryValue)]
+    pub fn imaginary_to_f64(&self) -> f64 {
+        self.imaginary_value
+    }
+
     pub fn to_i32(&self) -> i32 {
         self.value as i32
     }
 
     #[wasm_bindgen(js_name = toString)]
-    pub fn to_string(&self) -> String {
-        let string_value = self.value.to_string();
-        if string_value.contains(".") {
-            string_value
-                .trim_end_matches('0')
-                .trim_end_matches('.')
-                .to_string()
-        } else {
-            string_value
-        }
+    pub fn to_string_js(&self) -> String {
+        self.to_string()
     }
 
     #[wasm_bindgen(js_name = toStringBig)]
@@ -75,8 +72,11 @@ impl KalkNum {
     }
 
     #[wasm_bindgen(js_name = toScientificNotation)]
-    pub fn to_scientific_notation_js(&self) -> ScientificNotation {
-        self.to_scientific_notation()
+    pub fn to_scientific_notation_js(
+        &self,
+        complex_number_type: ComplexNumberType,
+    ) -> ScientificNotation {
+        self.to_scientific_notation(complex_number_type)
     }
 
     #[wasm_bindgen(js_name = estimate)]
diff --git a/kalk/src/kalk_num/with_rug.rs b/kalk/src/kalk_num/with_rug.rs
index 8fbc307..7505b36 100644
--- a/kalk/src/kalk_num/with_rug.rs
+++ b/kalk/src/kalk_num/with_rug.rs
@@ -43,34 +43,6 @@ impl KalkNum {
         self.value.to_i32_saturating().unwrap()
     }
 
-    pub fn to_string(&self) -> String {
-        let as_str = trim_number_string(&self.to_f64().to_string());
-
-        if self.imaginary_value != 0 {
-            let imaginary_as_str = trim_number_string(&self.imaginary_to_f64().to_string());
-            let sign = if self.imaginary_value < 0 { "-" } else { "+" };
-
-            format!("{} {} {}i", as_str, sign, imaginary_as_str)
-        } else {
-            as_str
-        }
-    }
-
-    pub fn to_string_real(&self) -> String {
-        trim_number_string(&self.to_f64().to_string())
-    }
-
-    pub fn to_string_imaginary(&self, include_i: bool) -> String {
-        let value = trim_number_string(&self.imaginary_to_f64().to_string());
-        if include_i && value == "1" {
-            String::from("i")
-        } else if include_i {
-            format!("{}i", value)
-        } else {
-            value
-        }
-    }
-
     pub fn get_unit(&self) -> &str {
         &self.unit
     }
@@ -81,17 +53,6 @@ impl KalkNum {
     }
 }
 
-fn trim_number_string(input: &str) -> String {
-    if input.contains(".") {
-        input
-            .trim_end_matches('0')
-            .trim_end_matches('.')
-            .to_string()
-    } else {
-        input.into()
-    }
-}
-
 impl From<f64> for KalkNum {
     fn from(x: f64) -> Self {
         KalkNum::new(Float::with_val(63, x), "")
diff --git a/kalk_cli/src/main.rs b/kalk_cli/src/main.rs
index b60c719..073f95d 100644
--- a/kalk_cli/src/main.rs
+++ b/kalk_cli/src/main.rs
@@ -7,8 +7,6 @@ use std::env;
 use std::fs::File;
 use std::io::Read;
 
-static DEFAULT_PRECISION: u32 = 53;
-
 fn main() {
     let args: Vec<String> = env::args().collect();
     let app = App::new("kalk")
diff --git a/kalk_cli/src/output.rs b/kalk_cli/src/output.rs
index 6dc7cb7..e05330c 100644
--- a/kalk_cli/src/output.rs
+++ b/kalk_cli/src/output.rs
@@ -1,4 +1,3 @@
-use crate::DEFAULT_PRECISION;
 use ansi_term::Colour::Red;
 use kalk::parser;