The product of two numbers is 450. One number is enlarged by 100 times and the other number is reduced by 10 times. What is the product?
两个数的积是450，一个数扩大到原来的100倍，另一个数缩小10倍，积是多少．
<gadget id="calculator">100 / 10</gadget>
<output>10</output>

<gadget id="calculator">450 * 10</gadget>
<output>4_500</output>

<result>4_500</result>