In an addition expression, one addend increases by 5, and the other addend also increases by 5. How much does their sum increase?
一个加法算式里，一个加数增加5，另一个加数也增加5，它们的和增加多少
<gadget id="calculator">5 + 5</gadget>
<output>10</output>

<result>10</result>