When Zhang Jun did addition, he regarded the 9 in the ones place as 6, and the 3 in the tens place as 8. The result is 115. What is the correct answer?
张军做加法时，把个位上的9看成了6，把十位上的3看作了8，结果和是115，正确的答案应该是多少？
<gadget id="calculator">115 - 86</gadget>
<output>29</output>

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

<result>68</result>