The school led the students to watch the cartoon "One Piece" in batches. The first batch was four classes in each of the fourth and fifth grades, with a total of 144 students. How many people in each class went to watch on average?
学校分批带领学生去电影院观看动画片«海贼王»，首批是四、五年级各4个班，共144人，平均每个班有多少人去观看？
<gadget id="calculator">4 * 2</gadget>
<output>8</output>

<gadget id="calculator">144 / 8</gadget>
<output>18</output>

<result>18</result>