production workshop has produced 640 packs of soybean milk powder, each of which is packed in 4 bags and packed in a box of 8 bags. How many boxes of these soybean milk powder can be packed in total?
某生产车间生产了640包豆奶粉，每4包装一袋，每8袋装一箱，这些豆奶粉共可装多少箱？
<gadget id="calculator">640 / 4 / 8</gadget>
<output>20</output>

<result>20</result>