The decimal point of a decimal is moved two places to the right and then divided by 0.1 to get 21.2. What is the original number?
一个小数的小数点先向右移动两位再除以0.1后，得21.2，这个数原来是多少．
<gadget id="calculator">0.1 / 100</gadget>
<output>0.001</output>

<gadget id="calculator">21.2 * 0.001</gadget>
<output>0.0212</output>

<result>0.0212</result>