The product of two numbers is 45. If one factor is reduced by 2 times and the other factor is 4 times larger, what is the product?
两个数的积是45，如果一个因数缩小2倍，另一个因数扩大4倍，积是多少．
<gadget id="calculator">4 / 2</gadget>
<output>2</output>

<gadget id="calculator">45 * 2</gadget>
<output>90</output>

<result>90</result>