When the little sloppy was calculating an addition problem, he regarded one of the 7 in the tens digit as 1, and the result was 502. What is the correct result?
小马虎在计算一道加法题时，把其中一个加数十位上的7看成了1，结果是502，正确的结果是多少．
<gadget id="calculator">70 - 10</gadget>
<output>60</output>

<gadget id="calculator">502 + 60</gadget>
<output>562</output>

<result>562</result>