The school tap water valve is broken, and the water keeps flowing out. It is known that the inner diameter of the water pipe is 2 cm, and the flow rate of water in the water pipe is 1 meter per second. Please calculate how many liters of water will be wasted per minute.
学校自来水的阀门坏了，水在不断地往外流．已知水管的内直径是2厘米，水管内水的流速是每秒1米，请你算一算每分钟会白白浪费掉多少升水．
<gadget id="calculator">1 * 10</gadget>
<output>10</output>

<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">3.14 * (1/100) * 10 * 1 * 60</gadget>
<output>18.84</output>

<result>18.84</result>