Wang Bing has 27.5 yuan, Zhao Liang has 19.8 yuan, and after they buy a pair of badminton rackets together, it will be 3.7 yuan more. How much is a pair of badminton rackets?
王兵有27.5元，赵亮有19.8元，两人合买一副羽毛球拍后还多3.7元，一副羽毛球拍多少钱？
<gadget id="calculator">27.5 + 19.8</gadget>
<output>47.3</output>

<gadget id="calculator">47.3 - 3.7</gadget>
<output>43.6</output>

<result>43.6</result>