CIRCLE WITH A DOT

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In honor of Pi Day, here's a video of a Marchant Silent Speed electromechanical calculator from the 1940s approximating Pi (355 / 113).

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In honor of Pi Day, here's a video of a Marchant Silent Speed electromechanical calculator from the 1940s approximating Pi (355 / 113).
#piday #antiquecalculator
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