The decimal point of a number is moved two places to the right, and then one place to the left. The number obtained is 5.72. What is the original number?
一个数的小数点先向右移动两位，再向左移动一位后得到的数是5.72，原来的数是多少．
<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">5.72 * (1/10)</gadget>
<output>0.572</output>

<result>0.572</result>