A Vintage Mechanical Calculator Spins Wildly While Trying to Divide by Zero
by Glen Tickle from Laughing Squid on (#18NT2)

A vintage Facit ESA-01 mechanical calculator spins wildly while it tries to divide by zero in a video posted by MultiGlizda. Dividing a number by zero gives an undefined result, so the machine is incapable of providing an answer.
via reddit