There is a batch of edible oil in the warehouse, each barrel is 3 kilograms, and every 6 barrels are packed in a box. Can 210 cases of such edible oil be transported at one time with a truck with a load of 4 tons?
仓库有一批食用油，每桶3千克，每6桶装一箱．运送这样的食用油210箱，用一辆载重4吨的货车一次可以运完吗？
<result>4</result>