A conical machine part has a base radius of 3 decimeters and a height of 2 decimeters. What is the volume of this part in cubic decimeters?
一个圆锥形机器零件，底面半径是3分米，高是2分米．这个零件的体积是多少立方分米？
<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">3.14 * 9 * 2 * (1/3)</gadget>
<output>18.84</output>

<result>18.84</result>