The volume and diameter of the base of a cylinder and a cone are equal. The height of the cone is 12 decimeters. What is the height of the cylinder in decimeters?
一个圆柱与一个圆锥的体积与底面直径都相等，圆锥的高是12分米，圆柱的高是多少分米．
<gadget id="calculator">12 / 3</gadget>
<output>4</output>

<result>4</result>