Two factors, one factor is enlarged by 10 times, and the other factor is reduced by 2 times, how many times is the product.
两个因数，一个因数扩大10倍，另一个因数缩小2倍，积多少倍．
<gadget id="calculator">10 / 2</gadget>
<output>5</output>

<result>5</result>