The inner diameter of the water pipe is 2 cm, and the flow rate of the water in the pipe is 8 cm per second. If a student goes to wash his hands and forgets to turn off the tap when he leaves, how many liters of water will be wasted in 5 minutes?
自来水管的内直径是2厘米，水管内水的流速是每秒8厘米，一位同学去洗手，走时忘记关掉水龙头，则5分钟浪费多少升水．
<result>7.536</result>