In a mathematics test in the fourth grade of Guangming Primary School, the average score is exactly 90 points, and the total score is □68□. How many students are there in this grade?
光明小学四年级在一次数学测试中，平均分正好是90分，总分为□68□，则该年级有学生多少人？
<gadget id="calculator">4_680 / 90</gadget>
<output>52</output>

<result>52</result>