Jaap Scherphuis | Marchant ACT-10M doing division in slow motion @jaapsch2 | Uploaded February 2021 | Updated October 2024, 7 minutes ago.
The Marchant calculators with the proportional gear mechanism were the fastest calculators until the introduction of electronics. This video shows the Marchant ACT-10M doing the division 355/113 = 3.141592920, which is a good approximation to pi. The calculation is shown in regular speed and in slow motion.

Other related videos:
The Marchant ACT-10M mechanical calculator: youtu.be/j88JslB67fU
The STOP button of the Marchant ACT-10M calculator: youtu.be/oeeHAUdeQRY
The Marchant XL: youtu.be/ewLT2s4THG0

For more information on this calculator and others in my collection, please visit my website:
jaapsch.net/mechcalc

0:00 Normal speed
0:25 Slow motion