A number is enlarged by 100 times and then reduced by 1000 times. The result is 65.7. What is the original number?
一个数扩大100倍，再缩小1000倍，结果是65.7，这个数原来是多少．
<gadget id="calculator">1_000 / 100</gadget>
<output>10</output>

<gadget id="calculator">65.7 * 10</gadget>
<output>657</output>

<result>657</result>