1260 students from Hope Primary School visited the Science and Technology Museum. 720 people entered the museum in the morning, and the rest of the students entered 3 times in the afternoon. How many people enter each time on average?
希望小学1260名学生参观科技馆．上午720人入馆参观，剩下的学生下午分3次入场，平均每次入场多少人？
<gadget id="calculator">1_260 - 720</gadget>
<output>540</output>

<gadget id="calculator">540 / 3</gadget>
<output>180</output>

<result>180</result>