When Xiaohong was doing addition, she wrongly wrote one of the addends 165 as 156, and the result was 481. What is the correct sum?
小红在做加法时，把其中一个加数165错写成156，结果得481，正确的和是多少．
<gadget id="calculator">481 - 156</gadget>
<output>325</output>

<gadget id="calculator">325 + 165</gadget>
<output>490</output>

<result>490</result>