A cone has a base diameter of 6 cm and a height of 9 cm. What is the volume of this cone?
一个圆锥的底面直径是6厘米，它的高是9厘米．这个圆锥的体积是多少？
<gadget id="calculator">6 / 2</gadget>
<output>3</output>

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

<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">(1/3) * 3.14 * 9 * 9</gadget>
<output>84.78</output>

<result>84.78</result>