There is a formula for subtracting three digits from four digits□□□□-□□□ Fill the seven numbers 0, 2, 5, 6, 7, 8, and 9 into the population respectively, what is the maximum difference obtained ．
有一个四位数减三位数的算式□□□□-□□□把0，2，5，6，7，8，9这七个数字分别填人口中，所得的差的最大值是多少．
<gadget id="calculator">9_876 - 205</gadget>
<output>9_671</output>

<result>9_671</result>