After the decimal point of a number is moved one place to the left, it is reduced by 0.18 from the original. What is the original number?
一个数的小数点向左移动一位后，比原来减少了0.18，这个数原来是多少．
<gadget id="calculator">10 - 1</gadget>
<output>9</output>

<gadget id="calculator">0.18 / 9</gadget>
<output>0.02</output>

<gadget id="calculator">0.02 * 10</gadget>
<output>0.2</output>

<result>0.2</result>