There are 640 cartons of Wahaha fruit milk, half of which have been transported away, and the rest will be transported by 8 trucks. How many cartons are transported by each car on average?
有640箱娃哈哈果奶，已运走一半，剩下的由8辆卡车来运，一次运完，平均每辆运几箱？
<gadget id="calculator">640 / 2 / 8</gadget>
<output>40</output>

<result>40</result>