392 students in the fifth grade went on an autumn outing. They set off in two columns. The distance between the front and back of two adjacent rows is 0.4 meters, and the team walks 60 meters per minute. To pass a 312-meter-long bridge, how many minutes does it take for the team to go from the top of the line to the bridge to the bottom of the line to leave the bridge?
五年级392名同学秋游．他们排成两路纵队出发．相邻两排前后各相距0.4米，队伍每分钟走60米．要经过一座长312米的大桥，队伍从排头的上桥到排尾的离开桥共需要多少分钟？
<result>6.5</result>