There are 25 people crossing the river by boat, and each boat can carry at most 5 people, how many boats are needed to cross the river at one time.
有25人坐船过河，每条船最多坐5人，至少需要用多少条船，才能一次全过河．
<gadget id="calculator">25 / 5</gadget>
<output>5</output>

<result>5</result>