A certain task can be completed in 4 days, B can be completed in 5 days, and C needs to be completed in 6 days. Now A, B, and C take turns to work one by one every day, how many days will it take to complete this task?
某项任务甲4日可完成，乙5日可完成，而丙需6日完成，今甲、乙、丙三人依次一日一轮换工作，则完成此任务需多少日．
<result>5</result>