After the decimal point of a number is moved to the right by 1 place, it is 23.4 larger than the original number. What is the original number?
一个数的小数点向右移动1位后，比原数大23.4，原数是多少．
<gadget id="calculator">10 - 1</gadget>
<output>9</output>

<gadget id="calculator">23.4 / 9</gadget>
<output>2.6</output>

<result>2.6</result>