The radius of the base of a cone is 4 cm, the height is 9 cm, what is the volume in cubic centimeters?
一个圆锥的底面半径是4cm，高是9cm，体积是多少立方厘米．
<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>