The inner diameter of the water pipe is 2 cm and the velocity of the flow in the pipe is 6 cm per second. A classmate went to wash his hands and forgot to turn off the tap when he left. How many liters of water was wasted in 6 minutes?
自来水管的内直径是2厘米，水管内的流速是每秒6厘米．一位同学去洗手，走时忘了关水龙头，6分钟浪费多少升水．
<gadget id="calculator">2 / 2</gadget>
<output>1</output>

<gadget id="calculator">1 ** 2</gadget>
<output>1</output>

<gadget id="calculator">1 * 1_000</gadget>
<output>1_000</output>

<gadget id="calculator">60 / 1_000</gadget>
<output>3/50 = around 0.06</output>

<gadget id="calculator">3.14 * 1 * 6 * 6 * (3/50)</gadget>
<output>6.7824</output>

<result>6.7824</result>