Enter a numerator and denominator, then hear the music. music stops when the number terminates (if it does). Sadly, there are few precision errors, but only when working with large numbers. although I've coded a workaround to stop most, some rarer ones cannot be stopped due to machine limitations. TL;DR: As long as you don't enter a hundred digits we're good.
Just me! Try entering 16 as a numerator and 177 as a denominator for example. Or 199 over 256.