When doing an addition formula, Xiaofang regards the 6 in the unit digit of one addend as 9, and the 3 in the tens digit of the other addition as 5, and the result is 120. What should be the correct answer?
做一道加法算式时，小芳把一个加数个位上的6看成了9，把另一个加数十位上的3看成了5，结果算成120，正确答案应该是多少
<gadget id="calculator">50 - 30</gadget>
<output>20</output>

<gadget id="calculator">9 - 6</gadget>
<output>3</output>

<gadget id="calculator">120 - 20 - 3</gadget>
<output>97</output>

<result>97</result>