Teacher Zhang went to the store to buy sporting goods for the school. He first bought 5 basketballs for 227.5 yuan, and then bought 5 footballs for 154.5 yuan. How much is a basketball more expensive than a football?
张老师到商店为学校买体育用品，他先花227.5元买了5个篮球，再花154.5元买了5个足球，一个篮球比一个足球贵多少元？
<gadget id="calculator">227.5 / 5</gadget>
<output>45.5</output>

<gadget id="calculator">154.5 / 5</gadget>
<output>30.9</output>

<gadget id="calculator">45.5 - 30.9</gadget>
<output>14.6</output>

<result>14.6</result>