The school organizes the fifth and sixth graders to have a picnic, and 4 minibuses transport 240 students from the fifth and sixth grades to the river twice. How many people do each vehicle take on average?
学校组织五、六年级学生去野炊，4辆中巴车分别运送两次把五、六年级的240人送到河边，平均每辆车每次乘坐多少人？
<gadget id="calculator">240 / 2 / 4</gadget>
<output>30</output>

<result>30</result>