When two factors are multiplied, one factor is multiplied by 10 and the other factor is multiplied by 3, what is the product?
两个因数相乘，一个因数扩大10倍，另一个因数扩大3倍，积会多少．
<gadget id="calculator">10 * 3</gadget>
<output>30</output>

<result>30</result>