cylinder and a cone have the same height and volume. The base of the cylinder is 6 square centimeters. How many square centimeters is the base of the cone?
一个圆柱与一个圆锥等高等体积，圆柱的底是6平方厘米，圆锥的底是多少平方厘米．
<gadget id="calculator">6 * 3</gadget>
<output>18</output>

<result>18</result>