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that a crank be pulled to add. Numbers were input simply by pressing keys. The machine was thus driven by finger power. Multiplication was similar to that on the adding machine, but users would "form" up their fingers over the keys to be pressed and press them down the multiple of times required. Using the above example, four fingers would be used to press down twice on the (fourth column), (third column), (second column) and (first column) keys. That finger shape would then move left two columns and press once. Usually, a small crank near

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