The product of two numbers is 200, one of the factors is multiplied by 4, and the other factor remains unchanged. What is the product at this time?
两个数的积是200，其中一个因数乘以4，另一个因数不变，这时的积是多少．
<gadget id="calculator">200 * 4</gadget>
<output>800</output>

<result>800</result>