When Xiaohua was doing an addition problem, he regarded the 6 in the ones digit of an addend as 0, and the resulting sum was 63. What should be the correct sum?
小华做一道加法题时，把一个加数个位上的6看作0，结果和是63，正确的和应该是多少．
<gadget id="calculator">63 + 6</gadget>
<output>69</output>

<result>69</result>