The inner diameter of the water pipe is 2 cm, and the water flow speed in the pipe is 8 cm per second. A student turned on the faucet to wash his hands, but forgot to turn it off when he was leaving. Another student found out and turned it off after 4 minutes. Please do the math, how many kilograms of water are wasted? (1 liter of water weighs 1 kg)
自来水管的内直径是2厘米，管内水流速度是每秒8厘米，一位同学打开水龙头洗手，走时忘了关，4分钟后被另一名同学发现才关上．请你算一算，大约浪费了多少千克水？(1升水重1千克)
<gadget id="calculator">1 * 6.0288</gadget>
<output>6.0288</output>

<result>6.0288</result>