What is the volume in milliliters of a conical container with a base radius of 2 decimeters and a height of 9 decimeters?
底面半径2分米，高9分米的圆锥形容器，容积是多少毫升．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">(1/3) * 3.14 * 4 * 9 * 1_000</gadget>
<output>37_680</output>

<result>37_680</result>