The product of two factors is 15.8, one factor is enlarged to 1.2 times, and the other factor is divided by 4, what is the product.
两个因数的积是15.8，一个因数扩大到它的1.2倍，另一个因数除以4，积是多少．
<gadget id="calculator">1.2 / 4</gadget>
<output>0.3</output>

<gadget id="calculator">15.8 * 0.3</gadget>
<output>4.74</output>

<result>4.74</result>