There are 260, 300, 280, and 312 students in grades 1 to 4 in a certain school. How many students are there on average in each grade?
某校1～4年级，分别有260人、300人、280人、312人，平均每个年级有多少人？
<gadget id="calculator">260 + 300 + 280 + 312</gadget>
<output>1_152</output>

<gadget id="calculator">1_152 / 4</gadget>
<output>288</output>

<result>288</result>