The inner diameter of the faucet of an electric water heater is 2 cm, and the flow rate of water after the faucet is turned on is 20 cm/s. A thermos jug with a volume of 2.512L, how many seconds can it be filled with water?
一种电热水炉的水龙头的内直径是2厘米，打开水龙头后水的流速是20厘米/秒．一个容积是2.512L的保温壶，多少秒能装满水？
<gadget id="calculator">2 / 2</gadget>
<output>1</output>

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

<gadget id="calculator">3.14 * 1 * 20</gadget>
<output>62.8</output>

<gadget id="calculator">1_000 / 62.8</gadget>
<output>15.923567</output>

<gadget id="calculator">2.512 * 1 * 15.923567</gadget>
<output>40</output>

<result>40</result>