There are 24 people crossing the river by boat, and each boat can hold up to 6 people. At least how many boats need to be rented to cross the river at one time.
有24人坐船过河，每条船最多能坐6人，至少需要租用多少条船，才能一次全过河．
<gadget id="calculator">24 / 6</gadget>
<output>4</output>

<result>4</result>