Basically, you store everything as integers.You can specify whatever precision you want, just by saying x digits are before the decimal. E.g. 1.234566 is 123456

Basically, you store everything as integers.You can specify whatever precision you want, just by saying x digits are before the decimal. E.g. 1.234566 is 1234566. Rounding when needed(just be consistent), but you never round until the last step which is when you're going to be displaying/storing the final value.