A cone whose base radius is 4 decimeters and whose height is 9 decimeters, what is its volume?
一个圆锥的底面半径是4分米，高是9分米，它的体积是多少？
<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 * 9</gadget>
<output>150.72</output>

<result>150.72</result>