On the other hand, if demand for the calculator increases too much the firm may be forced to pay overtime or add expensive production capacity to manufacture the remaining three products.

另一方面，如果计算器的需求过旺，公司就不得不花出超量的时间，或者花大钱增加生产能力来生产余下的三种产品。

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Rough estimates suggest it was about 1, 500 times faster than the best mechanical hand-cranked calculator of that era, he added.

BBC: Work begins on hardware to aid Edsac replica recreation

Since we're hard pressed to think of a scenario where having a calculator and card reader on hand would be essential to your well being -- especially considering that handy "Calculator" app that comes pre-loaded on most every computer these days -- it's difficult to postulate when this awkward combination of gadgets would actually come in handy.

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Each holding a calculator in their hand, the customer types in a number, each strong keystroke resonating against the hard plastic.

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