The teacher goes to buy prizes and buys 20 prizes at 7.5 yuan each. If you use the money to buy another prize at 2.5 yuan each, how many prizes can you buy?
老师去买奖品，买20份奖品，每份7.5元，如果用这些钱买另一种奖品，每份2.5元，可以买多少份？
<gadget id="calculator">20 / 2.5</gadget>
<output>8</output>

<gadget id="calculator">7.5 * 8</gadget>
<output>60</output>

<result>60</result>