If the area of the base of a cone is 9 square decimeters and the height is 4 decimeters, what is its volume?
一个圆锥的底面积是9平方分米，高是4分米，它的体积是多少．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(1/3) * 9 * 4</gadget>
<output>12</output>

<result>12</result>