Pack 2400 pairs of socks, 12 pairs into a box, 40 boxes into a box, how many boxes of these socks can be packed?
把2400双袜子进行包装，12双装成一盒，40盒装成一箱，这些袜子可以装多少箱？
<gadget id="calculator">2_400 / 12 / 40</gadget>
<output>5</output>

<result>5</result>