The decimal point of a number is moved one place to the right, which is 20.7 larger than the original number. What is the number?
一个数的小数点向右移动一位，比原数大20.7，这个数是多少．
<gadget id="calculator">10 - 1</gadget>
<output>9</output>

<gadget id="calculator">20.7 / 9</gadget>
<output>2.3</output>

<result>2.3</result>