When adding two numbers, if one addend is increased by 10 and the sum is increased by 6, what should happen to the other addend?
两个数相加，如果一个加数增加10，要使和增加6，那么另一个加数应有什么变化？
<gadget id="calculator">10 - 6</gadget>
<output>4</output>

<result>4</result>