Xiaojun has 13.5 yuan, and Xiaoli has 28.6 yuan. They are going to buy a pair of badminton rackets, and they have 3.2 yuan left. How much is this pair of rackets?
小军有13.5元，小丽有28.6元，两人准备买一副羽毛球拍，还剩3.2元，这副球拍多少元．
<gadget id="calculator">28.6 - 3.2</gadget>
<output>25.4</output>

<gadget id="calculator">13.5 + 25.4</gadget>
<output>38.9</output>

<result>38.9</result>