Xiao Ming's father uses 2.5 meters of cloth for a suit jacket and 1.4 meters for trousers; Xiao Ming uses 1.3 meters of cloth for a jacket jacket and 0.9 meters for trousers, how much more cloth does Dad use than Xiao Ming?
小明的爸爸做一套西装上衣用布2.5米，裤子用布1.4米；小明做一套服装上衣用布1.3米，裤子用布0.9米，爸爸比小明多用布多少米？
<gadget id="calculator">2.5 + 1.4</gadget>
<output>3.9</output>

<gadget id="calculator">1.3 + 0.9</gadget>
<output>2.2</output>

<gadget id="calculator">3.9 - 2.2</gadget>
<output>1.7</output>

<result>1.7</result>