…and taketh away.

If you somehow managed to end up in that most peculiar situation — sitting with two numbers on your hands and having no idea what to do with them — here’s the answer: among the many things you could do, you can actually subtract one from the other.

Of course, you’re armed with modern multigigahertz computing power and probably have a pile of handheld calculators nearby. But unless you’ve got a time machine on your desk, you might not realize there’s a magic we used to use in the ancient times of paper-and-pencil arithmetic.

The secrets of the past revealed! You can see the trick with your own eyes now!

Just enter two natural numbers and click the '=' button

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 Step by step operations.

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