The height of a cone is 15 cm and the radius of the base is 1/3 of the height. What is the volume of the cone in cubic centimeters?
一个圆锥的高是15厘米，底面半径是高的(1/3)，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">15 * (1/3)</gadget>
<output>5</output>

<gadget id="calculator">5 ** 2</gadget>
<output>25</output>

<gadget id="calculator">(1/3) * 3.14 * 25 * 15</gadget>
<output>392.5</output>

<result>392.5</result>