The sum of the two addends is 38.9, one of which is 12.5. What is the other addend?
两个加数的和是38.9，其中一个加数是12.5．另一个加数是多少？
<gadget id="calculator">38.9 - 12.5</gadget>
<output>26.4</output>

<result>26.4</result>