The inner diameter of the water pipe is 2 cm and the velocity of water in the pipe is 6 cm per second. A classmate forgot to turn off the tap after washing his hands. After 5 minutes, another classmate turned it off. How many liters of water was wasted during this period?
自来水管的内直径是2cm，水管内水的流速是每秒6cm．一位同学洗手后忘了关水龙头，5分钟后，另一位同学关上了，这期间共浪费水多少升．
<gadget id="calculator">2 / 10 / 2</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">(1/10) ** 2</gadget>
<output>1/100 = around 0.01</output>

<gadget id="calculator">6 / 10</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">(3/5) * 5 * 60</gadget>
<output>180</output>

<gadget id="calculator">3.14 * (1/100) * 180</gadget>
<output>5.652</output>

<result>5.652</result>