cylinder and a cone have the same base. The height of the cylinder is 2/3 of the height of the cone. The volume of the cone is 12cm**3. What is the volume of the cylinder in cm**3.
一个圆柱和一个圆锥等底，圆柱的高是圆锥高的(2/3)，圆锥的体积是12cm**3，圆柱的体积是多少cm**3．
<gadget id="calculator">12 * 2</gadget>
<output>24</output>

<result>24</result>