A cone has a base radius of 4 cm and a height of 3 cm. What is its volume in cm**3.
一个圆锥的底面半径是4cm，高是3cm．它的体积是多少cm**3．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

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

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

<result>50.24</result>