A number is first enlarged by 1000 times, then reduced by 10000 times, and then enlarged by 100 times, which is exactly 1. What was the original number?
一个数先扩大1000倍，再缩小10000倍，又扩大100倍，正好是1．这个数原来是多少？
<gadget id="calculator">1 / 100</gadget>
<output>1/100 = around 0.01</output>

<gadget id="calculator">10_000 / 1_000</gadget>
<output>10</output>

<gadget id="calculator">(1/100) * 10</gadget>
<output>1/10 = around 0.1</output>

<result>1/10 = around 0.1</result>