A number is reduced to one tenth of its original size, and then expanded to 100 times its original size, which is 4.78. What is the original number?
一个数缩小到原来的十分之一，又扩大到原来的100倍是4.78，这个数原来是多少
<gadget id="calculator">4.78 / 100</gadget>
<output>0.0478</output>

<gadget id="calculator">0.0478 * 10</gadget>
<output>0.478</output>

<result>0.478</result>