Move the decimal point of a decimal one place to the left and then two places to the right to get 53.8. What is the original number?
把一个小数的小数点先向左移动一位，再向右移动两位，就得到了53.8，原来这个小数是多少．
<gadget id="calculator">53.8 / 10</gadget>
<output>5.38</output>

<result>5.38</result>