A cylinder of plasticine with a height of 6 cm is kneaded into a cone with a constant bottom surface. What is the height of the kneaded cone in cm?
将一高是6厘米的圆柱体橡皮泥捏成一个底面不变的圆锥，捏成的圆锥的高是多少厘米．
<gadget id="calculator">6 * 3</gadget>
<output>18</output>

<result>18</result>