In 2008 mathematician and author Michael S. Schneider put together this incredible video illustrating how the mathematics used by Ancient Egyptians is identical to that used in computers today.
Initially we shook our heads in confusion when Schneider said this, but it all becomes very clear as he takes you through the process, simply and elegantly demonstrated on his large notepad.
The Ancient Egyptians figured out how to do multiplication without memorizing times tables, and how to do long division without that horrible half box that was the bane of your early childhood.
We took their tricks and built computers with them. WHOA.