Teacher Li bought 4 footballs, gave the salesperson 50 yuan, and got 2 yuan back. How much is each football?
李老师买了4个足球，给了售货员50元，找回2元，每个足球多少钱？
<gadget id="calculator">50 - 2</gadget>
<output>48</output>

<gadget id="calculator">48 / 4</gadget>
<output>12</output>

<result>12</result>