Mr. Wang has 500 yuan, and bought 5 footballs, 20 yuan each, and bought 8 basketballs with the remaining money. How much is each basketball?
王老师有500元钱，买下5个足球，每个20元，剩下的钱正好买了8个篮球，每个篮球多少元钱？
<gadget id="calculator">20 * 5</gadget>
<output>100</output>

<gadget id="calculator">500 - 100</gadget>
<output>400</output>

<gadget id="calculator">400 / 8</gadget>
<output>50</output>

<result>50</result>