If the radius of the base of the cone is doubled and the height remains the same, how many times will the volume of the cone be enlarged?
如果圆锥体的底面半径扩大2倍，高不变，那么这个圆锥体的体积扩大多少倍．
<gadget id="calculator">2 * 2</gadget>
<output>4</output>

<result>4</result>