The product of two numbers is 3.5, if one factor is multiplied by 4 and the other factor is multiplied by 6, what is the product?
两数的积是3.5，一个因数扩大4倍，另一个因数扩大6倍，则积多少．
<gadget id="calculator">4 * 6</gadget>
<output>24</output>

<gadget id="calculator">3.5 * 24</gadget>
<output>84</output>

<result>84</result>