The inner radius of the water pipe is 1 cm, and the flow rate of water in the pipe is 8 cm per second. A classmate went to wash his hands and forgot to turn off the tap when he left. Another classmate found out that he turned it off 10 minutes later. How much water was wasted.
自来水管的内半径是1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，10分钟后才被另一同学发现关上，浪费了多少升水．
<gadget id="calculator">10 ** 2</gadget>
<output>100</output>

<gadget id="calculator">1 / 100</gadget>
<output>1/100 = around 0.01</output>

<gadget id="calculator">8 / 10</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">(4/5) * 10 * 60</gadget>
<output>480</output>

<gadget id="calculator">3.14 * (1/100) * 480</gadget>
<output>15.072</output>

<result>15.072</result>