In the third grade, there are 4 classes collecting milk cartons. Class 1 and Class 2 collected 240 in total, and Class 3 and Class 4 collected 200 in total. What is the average number collected in each class?
三年级有4个班收集牛奶盒，一班和二班共收集240个，三班和四班共收集200个，平均每班收集了多少个．
<gadget id="calculator">240 + 200</gadget>
<output>440</output>

<gadget id="calculator">440 / 4</gadget>
<output>110</output>

<result>110</result>