A number is expanded to 10000 times of it, then reduced to (1/100000) of the new number, and then expanded to 1000 times of this number, the number obtained at this time is exactly 9, what is the original number?
一个数扩大到它的10000倍，再缩小到新数的(1/100000)，又扩大到此数的1000倍，这时得到的数正好是9，这个数原来是多少？
<gadget id="calculator">1_000 / 100_000</gadget>
<output>1/100 = around 0.01</output>

<gadget id="calculator">10_000 * (1/100)</gadget>
<output>100</output>

<gadget id="calculator">9 / 100</gadget>
<output>9/100 = around 0.09</output>

<result>9/100 = around 0.09</result>