There is a faucet in the school with an inner diameter of 2 cm, and the flow rate of water after the faucet is turned on is 20 cm/s. Aunt Zhang used this faucet to water a 10-square-meter flowerbed, and it took 10 minutes. How many liters of water is used to water this garden.
学校有一个水龙头的内直径是2厘米，打开水龙头后水的流速是20厘米/秒．张阿姨用这个水龙头浇一片10平方米的花圃，用了10分钟．浇这一片花圃用水多少升．
<gadget id="calculator">2 / 100 / 2</gadget>
<output>1/100 = around 0.01</output>

<gadget id="calculator">(1/100) ** 2</gadget>
<output>1/10_000 = around 0.0001</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">10 * 1 * 60</gadget>
<output>600</output>

<gadget id="calculator">3.14 * (1/10_000) * (1/5) * 600 * 1_000</gadget>
<output>37.68</output>

<result>37.68</result>