Move the decimal point of a number three places to the left and then two places to the right to get 9. What is the original number?
把一个数的小数点先向左移动三位，再向右移动两位得9，原数是多少．
<gadget id="calculator">100 / 100</gadget>
<output>1</output>

<gadget id="calculator">9 * 1 * 10</gadget>
<output>90</output>

<result>90</result>