The product of two numbers is 450, one multiplier is enlarged by 100 times, and the other multiplier is reduced by 10 times, what is the knot now.
两个数的积是450，一个乘数扩大100倍，另一个乘数缩小10倍，现在的结是多少．
<gadget id="calculator">100 / 10</gadget>
<output>10</output>

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

<result>4_500</result>