When Xiaohong was doing a subtraction problem, she regarded the 2 in the tens digit of the subtraction as 9, and the 7 in the unit digit of the subtrahend as 1. The calculated difference was 758. Do you know the correct result? ?
小红在做一道减法题时，把减数十位上的2看成了9，把减数个位上的7看成了1，结果算出来的差是758，你知道正确的结果是多少吗？
<gadget id="calculator">758 + 91</gadget>
<output>849</output>

<gadget id="calculator">849 - 27</gadget>
<output>822</output>

<result>822</result>