There are 45 students in Class 4, and 720 exercise books are used in 2 semesters. How many exercise books do each student use per semester on average?
四1班有45名学生，2个学期共用720本练习本，平均每个学生每学期用多少本练习本？
<gadget id="calculator">720 / 2 / 45</gadget>
<output>8</output>

<result>8</result>