The product of two factors is 75, if both factors are doubled, what is the product
两个因数的积是75，如果两个因数都扩大2倍，那么积是多少
<gadget id="calculator">2 * 2</gadget>
<output>4</output>

<gadget id="calculator">75 * 4</gadget>
<output>300</output>

<result>300</result>