If one factor is enlarged by 10 times and the other factor is also reduced by 5 times, the original product will be as many times as possible.
一个因数扩大10倍，另一个因数也缩小5倍，原来的积就多少倍．
<gadget id="calculator">10 / 5</gadget>
<output>2</output>

<result>2</result>