There are 160 students in the fourth grade of a certain school going to the sea to play, and each boat is limited to 40 people. How many boats are needed at least?
某校四年级有160人去海上玩耍，每船限载40人，至少需要多少只船？
<gadget id="calculator">160 / 40</gadget>
<output>4</output>

<result>4</result>