Knead a cylindrical plasticine with a base radius of 2 cm and a height of 6 cm to form a cone equal to the base of the cylinder. What is its height?
把一块底面半径2厘米、高6厘米的圆柱形橡皮泥捏成一个与圆柱底面相等的圆锥形，它的高是多少？
<gadget id="calculator">6 * 3</gadget>
<output>18</output>

<result>18</result>