Gottfried Leibniz did...
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Leibnizs calculator is simply an improsive version of the adding machine.This machine could perform multiplication and division as well.Talking about the history of a machine it was invented by a German mathematician Gottifried
James Gimzewski at the IBM laboratory in Zurich, Switzerland made the world's smallest calculator.
1970
Blaise Pascal invented the calculator in 1642, France
CALCULATOR