Number Cruncher The gaslight glittered on the polished brass of the machine. 'My Number Cruncher can calculate mechanically the result of a calculation on three positive whole numbers used once each, provided it is restricted to plus, times and brackets operations,' declared the Engineer. He opened the delicate cover and made meticulous adjustments. 'There, I have disposed it for one particular expression. Please put it to the test.' I chose three numbers, all greater than 1, and rotated the three dials to those positions.

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