If a number is reduced by 10 times and expanded by 100 times, it is 31.3. What is this number?
一个数缩小10倍，再扩大100倍是31.3，这个数是多少？
<gadget id="calculator">31.3 / 100</gadget>
<output>0.313</output>

<gadget id="calculator">0.313 * 10</gadget>
<output>3.13</output>

<result>3.13</result>