Dreisatz 1.1.0

Dreisatz enables you to calculate the rule-of-three easy, fast and comfortable.
The rule-of-three is a mathematical method to determine an unknown fourth value out of three known values. If 1 apple (a) cost 4 bucks (b), how much are 2 apples ©? The answer is 8 (x) and this task was supereasy. For more complicated calculations, we made »Dreisatz«. If just everything depending math could be that fun!