A cone has a base circumference of 25.12 cm and a height of 3 cm, what is its volume in cm**3.
一个圆锥的底面周长为25.12cm，高3cm，其体积是多少cm**3．
<gadget id="calculator">25.12 / 3.14 / 2</gadget>
<output>4</output>

<gadget id="calculator">4 ** 2</gadget>
<output>16</output>

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

<gadget id="calculator">3.14 * 16 * 3 * (1/3)</gadget>
<output>50.24</output>

<result>50.24</result>