There are 80 students in the first grade of Dongfang Primary School, 96 students in the second grade, 84 students in the third and fourth grades, 76 students in the fifth grade, and 90 students in the sixth grade. How many students are there on average in each grade?
东方小学一年级有学生80人，二年级有96人，三、四年级各有84人，五年级有76人，六年级有90人．平均每个年级有学生多少人？
<gadget id="calculator">80 + 96 + 84 + 84 + 76 + 90</gadget>
<output>510</output>

<gadget id="calculator">510 / 6</gadget>
<output>85</output>

<result>85</result>