Consider the 5 in the digit of an addend as 8, and the 4 in the tens digit as 6, and calculate the sum to be 85. What is the correct sum?
把一个加数个位的5看成8，十位的4看成6，计算出和是85，正确的和是多少．
<gadget id="calculator">85 - 68</gadget>
<output>17</output>

<gadget id="calculator">17 + 45</gadget>
<output>62</output>

<result>62</result>