There are 37 students in Class 1 of the fourth grade. All the students go to the other side of the river for a picnic on weekends. Now to cross the river by boat, there is only one boat at the ferry that can carry 5 people at a time, and there is no boatman. At least how many times would they have to use this boat if they were all going to cross the river?
四年级一班有37人，周末所有同学一起去河的对岸野炊．现在要坐船过河，渡口处只有一只一次能载5人的小船，而且没有船夫．他们要全部过河的话，至少要用这只船多少次？
<gadget id="calculator">37 - 5</gadget>
<output>32</output>

<gadget id="calculator">32 / 4</gadget>
<output>8</output>

<gadget id="calculator">8 + 1</gadget>
<output>9</output>

<result>9</result>