A cylinder and a cone with the same base and height, the volume of the cone is 30cm**3, what is the volume of the cylinder in cm**3.
等底等高的圆柱和圆锥，圆锥的体积是30cm**3，圆柱的体积是多少cm**3．
<gadget id="calculator">30 * 3</gadget>
<output>90</output>

<result>90</result>