The convenience store shipped back 960 bags of washing powder, packed in 4 cartons on average, 12 boxes per box, how many bags of washing powder per box?
便民小商店运回960袋洗衣粉，平均装在4个纸箱里，每箱12盒，每盒装多少袋洗衣粉？
<gadget id="calculator">960 / 4 / 12</gadget>
<output>20</output>

<result>20</result>