After the decimal point of a decimal is moved one place to the right, the difference between the obtained number and the original number is 48.6, so what is the original number?
一个小数的小数点向右移动一位后，所得到的数与原数相差48.6，那么原来这个小数是多少．
<gadget id="calculator">10 - 1</gadget>
<output>9</output>

<gadget id="calculator">48.6 / 9</gadget>
<output>5.4</output>

<result>5.4</result>