When doing an addition, Xiao Ming regards the 9 in the units digit of the addend as 6, and the 3 in the tens digit as 8, and the result is 115. What should be the correct number.
在做一道加法时，小明把加数个位上的9看作了6，把十位上的3看作了8，结果和得115．正确的得数应该是多少．
<gadget id="calculator">115 - 86</gadget>
<output>29</output>

<gadget id="calculator">29 + 39</gadget>
<output>68</output>

<result>68</result>