A certain school has 260 students in the first grade, 300 students in the second grade, 280 students in the third grade, and 312 students in the fourth grade. How many students are there on average in each grade?
某校一年级有260人，二年级有300人，三年级有280人，四年级有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>