A cylinder and a cone have the same base and height, the volume of the cone is 9dm**3, what is the volume of the cylinder dm**3.
一个圆柱和一个圆锥等底等高，圆锥的体积是9dm**3，圆柱的体积是多少dm**3．
<gadget id="calculator">9 * 3</gadget>
<output>27</output>

<result>27</result>