On Sunday, 4 students went to visit the Natural History Museum, and each ticket was 25 yuan. How much does each person spend on average for a car ride of 20 yuan?
星期天，4名同学去参观自然博物馆，每张门票25元．坐车共用20元，平均每人花了多少钱？
<gadget id="calculator">20 / 4</gadget>
<output>5</output>

<gadget id="calculator">5 + 25</gadget>
<output>30</output>

<result>30</result>