Pascaline (Mechanical Calculator)

It's the year 1645. Blaise Pascal, a brilliant 19-year-old mathematic presents his newly created machine, The Pascaline, also known as Pascal's machine, honoring himself. The machine was a metalic box with some dials to turn and a numeric display. Inside, though, there was an intrincate mechanism of gears that allowed the machine to do simple calculations. It's original purpose was to help Blaise's father with his profession, accountant. Little did he know that his machine would set the first stone towards the computers that we know today -even the one you're reading this through-. Now, it has been 480 years since his invention, and thanks to 3D printing, you can have your own version of it at your home. Here is a model of the Pascaline. Because the original machine was so complicated and big, I have reduced it to only been able tom perform arithmetic operations with 5 digit numbers. Also, keep in mind that the gears 2 and 4 (the tens and thousands/the ones in blue) turn counterclockwi