There is a multi-digit number 201312210840, a total of 12 numbers. Cross out 8 of them to form a four-digit number. Then how much is the maximum value of this four-digit number greater than the minimum value.
有一多位数201312210840，一共12个数字．划去其中的8个数字，可形成一个四位数．那么这个四位数的最大值比最小值大多少．
<gadget id="calculator">3_840 - 1_040</gadget>
<output>2_800</output>

<result>2_800</result>