In the multiplication formula, if one factor is multiplied by 5 times and the other factor is multiplied by 2, then the product is multiplied to the original value.
在乘法算式中，一个因数扩大原来的5倍，另一个因数扩大原来的2倍，则积扩大为原来的多少．
<gadget id="calculator">5 * 2</gadget>
<output>10</output>

<result>10</result>