cone viewed from above is a circle with a diameter of 6 cm, and viewed from the front is an isosceles triangle. The ratio of the apex to the base of the isosceles triangle is 2:1. What is the volume of the cone? Cubic centimeters?
一个圆锥从上面观看到的图形是一个直径为6厘米的圆，从正面观看到的图形是一个等腰三角形，等腰三角形顶角与底角的比是2﹕1，这个圆锥的体积是多少立方厘米？
<gadget id="calculator">6 / 2</gadget>
<output>3</output>

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

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

<gadget id="calculator">3.14 * 9 * 3 * (1/3)</gadget>
<output>28.26</output>

<result>28.26</result>