The school bought 5 footballs and 5 basketballs. It costs 75 yuan to buy a football and 60 yuan to buy a basketball. How much is a football more expensive than a basketball? (Answer in two ways.)
学校买了足球和篮球各5个，买足球用去75元，买篮球用去60元，一个足球比一个篮球贵多少元？(用两种方法解答．)
<gadget id="calculator">75 / 5</gadget>
<output>15</output>

<gadget id="calculator">60 / 5</gadget>
<output>12</output>

<gadget id="calculator">15 - 12</gadget>
<output>3</output>

<result>3</result>