There is a decimal, first move its decimal point to the left by three digits, then expand it by 10000 times to get 45.6, what is the original decimal.
有一个小数，先将它的小数点向左移动三位后，再扩大10000倍得45.6，原来的小数是多少．
<gadget id="calculator">45.6 / 10_000</gadget>
<output>0.00456</output>

<gadget id="calculator">0.00456 * 1_000</gadget>
<output>4.56</output>

<result>4.56</result>