There is a three-digit number rounded to two decimal places is 4.00, what is the difference between the maximum value and the minimum value of this number.
有一个三位小数用四舍五入保留两位小数是4.00，这个数的最大值与最小值的差是多少．
<gadget id="calculator">4.004 - 3.995</gadget>
<output>0.009</output>

<result>0.009</result>