If a number is enlarged by 1000 times and then reduced by 10 times, it is 8.9. What is the original number?
一个数扩大1000倍再缩小10倍后是8.9，原来这个数是多少．
<gadget id="calculator">8.9 / 100</gadget>
<output>0.089</output>

<result>0.089</result>