cylinder and a cone have the same base and height. If the volume of the cone is 30 cubic centimeters, what is the volume of the cylinder?
圆柱和圆锥等底等高，若圆锥体积是30立方厘米，圆柱的体积是多少．
<gadget id="calculator">30 * 3</gadget>
<output>90</output>

<result>90</result>