The product of two factors is 5.2. If one factor is multiplied by 20 and the other factor is divided by 5, what is the product?
两个因数的积为5.2，如果一个因数乘20，另一个因数除以5，那么积是多少．
<gadget id="calculator">20 / 5</gadget>
<output>4</output>

<gadget id="calculator">5.2 * 4</gadget>
<output>20.8</output>

<result>20.8</result>