The product of two factors is 100, and one factor is multiplied by 4 while the other remains unchanged. What is the product now?
两个因数的积是100，这时一个因数扩大4倍，另一个因数不变，现在的积是多少．
<gadget id="calculator">100 * 4</gadget>
<output>400</output>

<result>400</result>