A cone with a base diameter of 4 decimeters and a height of 6 decimeters, what is its volume in decimeters**3.
一个圆锥体，底面直径4分米，高6分米，它的体积是多少分米**3．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

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

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

<gadget id="calculator">(1/3) * 3.14 * 4 * 6</gadget>
<output>25.12</output>

<result>25.12</result>