For a two-digit number, after the decimal point is moved one place to the right, the result is 40.5 greater than the original number. What is the original two decimal places.
一个两位数，其小数点向右移动一位后，结果比原来的数大40.5．原来的两位小数是多少．
<gadget id="calculator">40.5 / 9</gadget>
<output>4.5</output>

<result>4.5</result>