A cone has a base diameter of 9 cm and a height of 15 cm. What is the volume of the cone in cubic centimeters?
一个圆锥的底面直径为9厘米，高15厘米，这个圆锥的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">9 / 2</gadget>
<output>9/2 = around 4.5</output>

<gadget id="calculator">(9/2) ** 2</gadget>
<output>81/4 = around 20.25</output>

<gadget id="calculator">(1/3) * 3.14 * (81/4) * 15</gadget>
<output>317.925</output>

<result>317.925</result>