When adding two numbers, one number is increased by 1.5 and the other number is decreased by 1.4, and by how much
两个数相加，一个数增加1.5，另一个数减少1.4，和增加多少
<gadget id="calculator">1.5 - 1.4</gadget>
<output>0.1</output>

<result>0.1</result>