The circumference of the base of a cone is 28.26 decimeters, and its height is equal to the diameter of the base. What is the volume of this cone in cubic decimeters?
一个圆锥的底面周长是28.26分米，它的高与底面直径相等．这个圆锥的体积是多少立方分米？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">28.26 / 3.14</gadget>
<output>9</output>

<gadget id="calculator">9 / 2</gadget>
<output>9/2 = around 4.5</output>

<gadget id="calculator">(1/3) * 3.14 * (9/2) * 9</gadget>
<output>42.39</output>

<result>42.39</result>