When adding two numbers, one addend is increased by 0.7 and the other is decreased by 3.6, what is the sum
两个数相加，一个加数增加0.7，另一个加数减少3.6，那么和多少
<gadget id="calculator">3.6 - 0.7</gadget>
<output>2.9</output>

<result>2.9</result>