A cone has a base diameter of 4 cm and a height of 15 cm, what is its volume in cubic centimeters?
一个圆锥的底面直径是4厘米，高是15厘米，它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">4 / 2</gadget>
<output>2</output>

<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">(1/3) * 3.14 * 4 * 15</gadget>
<output>62.8</output>

<result>62.8</result>