Four students, Xiao Ming, Xiao Li, Xiao Qiang, and Xiao Fang scored 82, 75, 90, and 89 points in a test. what is the average grade of the four of them
小明、小丽、小强、小芳四名同学在某次考试成绩分别为82分、75分、90分、89分．他们四个的平均成绩是多少
<gadget id="calculator">82 + 75 + 90 + 89</gadget>
<output>336</output>

<gadget id="calculator">336 / 4</gadget>
<output>84</output>

<result>84</result>