When Xiao Ming did addition, he regarded the 6 in the ones place as 8, and the 3 in the tens place as 5, and the result was 800. How much is this addition actually worth?
小明做加法时，把个位上的6看成了8，把十位上的3看成了5，结果得800，这道加法实际应得多少．
<gadget id="calculator">800 - 58</gadget>
<output>742</output>

<gadget id="calculator">742 + 36</gadget>
<output>778</output>

<result>778</result>