Aunt Li, who runs a teahouse, went to the mall to buy 30 teacups, but the difference was 25 yuan. In the end, she only bought 25, leaving 37.5 yuan. How much is each teacup?
开茶馆的李阿姨去商场购买30个茶杯，结果差了25元；最后只买了25个，还剩了37.5元，每个茶杯多少钱？
<gadget id="calculator">25 + 37.5</gadget>
<output>62.5</output>

<gadget id="calculator">30 - 25</gadget>
<output>5</output>

<gadget id="calculator">62.5 / 5</gadget>
<output>12.5</output>

<result>12.5</result>