Reactive calculator

Expressions

2 inch to cm
cos(45 deg)
2 + 2 * 2
sqrt(3^2 + 4^2)

Variables

a = 25
b = a * 2
postal code = 1122

Summing lists

animals:
  cats = 2
  dogs = 3
plants:
  trees = 20
  vegetables:
    potatoes = 10
    carrots = 10

Functions

pow2(x) = x ^ 2
pow2(6)

Last result

2 * 2
last + 1

Keys

Duplicate line or selection: Ctrl+D

Change selected number: Up/Down

Change selected number 10x: Shift+Up/Down

Change indent: Tab/Shift+Tab

Using Math.js:

https://github.com/grimalschi/mathjs