There are 47 members in the school dance team. If the method of "one pass one" is used to call each team member for emergency training, how many minutes will it take at least. (One call takes 1 minute)
学校舞蹈队共有47人，如果采用"一传一"的方法，打电话通知每一位队员进行急训，至少需要多少分钟．(打一次电话用1分钟)
<result>6</result>