When two factors are multiplied, one factor is multiplied by 3, and the other factor is multiplied by 4. What is the product?
两个因数相乘，一个因数扩大3倍，另一个因数扩大4倍，积多少．
<gadget id="calculator">3 * 4</gadget>
<output>12</output>

<result>12</result>