When two factors (except 0) are multiplied, one factor is multiplied by 2, and the other factor is multiplied by 3, and the product is equal to the product.
两个因数(0除外)相乘，一个因数扩大2倍，另一个因数扩大3倍，积就多少．
<gadget id="calculator">2 * 3</gadget>
<output>6</output>

<result>6</result>