During the summer vacation, Teacher Li suddenly received a notice from his superiors that the art festival would organize 60 students to rehearse the program. He notified by phone. If each call takes 1 minute, at least how many minutes will it take to notify each team member.
暑假里李老师突然接到上级通知，艺术节要组织60名学生排练节目，他以打电话的方式通知，如果每打一次电话需1分钟，至少需要多少分钟可通知到每个队员．
<result>6</result>