Calculating large numbers is a pain if all you have handy is your brain and a pencil. This is why people have created systems and objects to make the process easier.http://quillandpad.com/2015/07/26/mechanical-computers-from-then-to-now-greubel-forsey-quantieme-perpetuel-a-equation/

These are random photos and videos that are collated for prosperity sake. Enjoy!!!!!!!!!.........