If the diameter of the base of a cone is tripled and the height is reduced to 1/3 of the original, what is the volume of the cone?
一个圆锥体的底面直径扩大3倍，高缩小到原来的(1/3)，圆锥的体积多少．
<gadget id="calculator">3 / 1</gadget>
<output>3</output>

<result>3</result>