The product of two factors is 480. If one factor is doubled and the other factor is reduced to 1/4, what is the product?
两个因数的积是480，若一个因数扩大到原来的2倍，另一个因数缩小为原来的(1/4)，那么积是多少．
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">480 * 2 * (1/4)</gadget>
<output>240</output>

<result>240</result>