Two circular cylindrical drainage pipes are installed in the pool. The diameter of pipe A is 6cm and the diameter of pipe B is 4cm. How many cubic meters?
水池安装两根圈柱形排水管，甲管直径6cm，乙管直径4cm，排水时管内水的流速是每秒流过1米，两管同时排水2小时把满池水排完，求水池的容积多少立方米？
<gadget id="calculator">6 / 100 / 2</gadget>
<output>3/100 = around 0.03</output>

<gadget id="calculator">(3/100) ** 2</gadget>
<output>9/10_000 = around 0.0009</output>

<gadget id="calculator">3.14 * (9/10_000) * 1</gadget>
<output>0.002826</output>

<gadget id="calculator">4 / 100 / 2</gadget>
<output>1/50 = around 0.02</output>

<gadget id="calculator">(1/50) ** 2</gadget>
<output>1/2_500 = around 0.0004</output>

<gadget id="calculator">3.14 * (1/2_500) * 1</gadget>
<output>0.001256</output>

<gadget id="calculator">0.002826 + 0.001256</gadget>
<output>0.004082</output>

<gadget id="calculator">0.004082 * 1 * 3_600 * 2</gadget>
<output>29.3904</output>

<result>29.3904</result>