In a multiplication expression, if one factor is multiplied by 3 and the other factor is multiplied by 4, the product will be multiplied by as many times as possible.
在一个乘法算式中，一个因数扩大3倍，另一个因数扩大4倍，积就扩大多少倍．
<gadget id="calculator">3 * 4</gadget>
<output>12</output>

<result>12</result>