For a number, move the decimal point to the right two places, the number obtained is 84.15 greater than the original number, what is the original number?
一个数，把小数点向右移动两位，得到的数比原数大84.15，原数是多少．
<gadget id="calculator">10 - 1</gadget>
<output>9</output>

<gadget id="calculator">84.15 / 9</gadget>
<output>9.35</output>

<result>9.35</result>