When Xiaohu calculated a certain number minus 5776, the difference he obtained was 2022. During the test, he found that he had mixed up the ones and tens digits of the minuend. What should be the correct difference?
小虎在计算某数减5776时，求得的差是2022，检验时发现把被减数的个位和十位上的数写混了，正确的差应该是多少．
<gadget id="calculator">7_789 - 5_776</gadget>
<output>2_013</output>

<result>2_013</result>