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 (c)? 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!

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Compatibility:
• 64-bit processor
• OS X 10.10 or later

Home Page - https://itunes.apple.com/app/dreisatz/id1156930257