A cylinder and a cone have the same base radius and the same height. The volume of the cone is 6 cubic decimeters. What is the volume of the cylinder?
一个圆柱和一个圆锥的底面半径相等，高也相等，这个圆锥的体积是6立方分米，这个圆柱的体积是多少立方分米．
<gadget id="calculator">6 * 3</gadget>
<output>18</output>

<result>18</result>