After removing the decimal point of a one-digit number, the number is 39.6 greater than the original number. What is the number?
把一个一位小数的小数点去掉后，比原数大39.6，这个小数是多少．
<gadget id="calculator">10 - 1</gadget>
<output>9</output>

<gadget id="calculator">39.6 / 9</gadget>
<output>4.4</output>

<result>4.4</result>