The difference between the two numbers is 25.2. Now the minuend increases by 6.4, and the subtrahend decreases by 2.6. What is the difference?
两个数相减差是25.2．现在被减数增加6.4，减数减少2.6，差是多少．
<gadget id="calculator">6.4 + 2.6</gadget>
<output>9</output>

<gadget id="calculator">25.2 + 9</gadget>
<output>34.2</output>

<result>34.2</result>