The two factors are 25 and 8 respectively, if one of the factors is multiplied by 4, what is the product?
两个因数分别是25和8，把其中一个因数扩大4倍，积是多少．
<gadget id="calculator">25 * 8</gadget>
<output>200</output>

<gadget id="calculator">200 * 4</gadget>
<output>800</output>

<result>800</result>