It is known that the volume of a cylinder is 63 cubic centimeters. Now a cone has the same base and height as the cylinder. What is the volume of the cone?
已知一个圆柱的体积为63立方厘米，现在一个圆锥与这个圆柱同底同高，问这个圆锥的体积是多少？
<gadget id="calculator">63 / 3</gadget>
<output>21</output>

<result>21</result>