When most folks use a pocket calculator to perform some mathematical task like division, they rarely pause to ponder what's actually going on “under-the-hood”; instead, they simply accept the result ...

This chaos of churning gears comes down to a fairly simple explanation. Division is just a series of sequential subtraction, and division by zero is the sequential subtraction of zero, over and over ...

This file type includes high resolution graphics and schematics. You can build an analog calculator using a pulse-width modulator (PWM) to perform accurate four-quadrant multiplication and division.