The decimal point of a certain number is moved one place to the right, which is 18 larger than the original number. What is the original number?
某数的小数点向右移动一位，比原来的数大18，原来的数是多少．
<gadget id="calculator">10 - 1</gadget>
<output>9</output>

<gadget id="calculator">18 / 9</gadget>
<output>2</output>

<result>2</result>