The school organizes a spring outing for students in the third, fourth, and fifth grades. Among them, there are 200 students in the third grade, and 360 students in the fourth and fifth grades. If each bus can take 40 students, the fourth and fifth grades should prepare a few more buses than the third graders. bus?
学校组织三、四、五年级的学生春游，其中三年级有学生200人，四五年级共有360人，如果每辆大客车可乘40位同学，四五年级比三年级要多准备几辆大客车？
<gadget id="calculator">360 / 40</gadget>
<output>9</output>

<gadget id="calculator">200 / 40</gadget>
<output>5</output>

<gadget id="calculator">9 - 5</gadget>
<output>4</output>

<result>4</result>