Teacher Ruan brought a sum of money. He originally planned to buy only footballs, but he could buy 30 of them. As a result, the money was used to buy 23 footballs and 15 badminton rackets. It is known that each soccer ball costs 60 yuan, how much does each badminton racket cost?
阮老师带了一笔钱，原打算只买足球，正好可以买30只．结果用这笔钱买了23只足球和15副羽毛拍．已知每只足球60元，每副羽毛拍需多少元？
<gadget id="calculator">30 - 23</gadget>
<output>7</output>

<gadget id="calculator">60 / 15</gadget>
<output>4</output>

<gadget id="calculator">7 * 4</gadget>
<output>28</output>

<result>28</result>