cone and a cylinder are of the same height and volume. It is known that the base area of the cylinder is 6 square meters. What is the area of the base of the cone?
一个圆锥与一个圆柱等高等体积，已知圆柱的底面积是6平方米，圆锥的底面积是多少．
<gadget id="calculator">6 * 3</gadget>
<output>18</output>

<result>18</result>