Topalian Calculation Engine

Here is a JavaScript app that teaches a functional approach to object oriented programming, using an array of objects to utilize 45 calculation functions. This JavaScript application teaches you many important programming concepts. Calculation Functions Taught Here Include:
Addition
Addition3
Subtraction
Multiplication
Division
Modulo
Calculate Mean Average of Numbers
Calculate Median Average of Number
Calculate Sales Tax and Total Price
Feet to Meter
Meter to Feet
Calculate Feet and Inch to Meter
Calculate Meter and Centimeter to Feet
Calculate Meter to Mile
Calculate Mile to Meter
Decimal to Percent
Percent to Decimal
Mph to Kph
Kph to Mph
Fps to Mph
Mph to Fps
Celsius to Fahrenheit
Fahrenheit to Celsius
Circle Area from Radius
Circle Area from Diameter
Circle Area from Circumference
Circle Circumference from Diameter
Circle Circumference from Radius
Circle Circumference from Area
Rectangle Area
Rectangle Perimeter
Sphere Area from Radius
Sphere Radius from Diameter
Sphere Volume from Radius
Square Area
Square Perimeter
Triangle Equilateral Perimeter
Triangle Isosceles Perimeter
Calculate Year Born from Current Year
Calculate Year Born from Specified Year
Percent
Percent of Hour
Distance
Speed
Time