After the decimal point of a number is moved to the right, it is 29.7 larger than the original number. What is the original number?
一个数的小数点向右移动一位后，比原数大29.7，原数是多少．
<gadget id="calculator">10 - 1</gadget>
<output>9</output>

<gadget id="calculator">29.7 / 9</gadget>
<output>3.3</output>

<result>3.3</result>