After a number is reduced by 10 times and then expanded by 100 times, it is 4.78. What is the original number?
一个数缩小10倍后，又扩大100倍是4.78，这个数原来是多少
<gadget id="calculator">4.78 / 10</gadget>
<output>0.478</output>

<result>0.478</result>