Knead a cylindrical plasticine into a cone with the same base as it. It is known that the height of the cylinder is 6 cm. What is the height of the kneaded cone in cm?
把一个圆柱形的橡皮泥揉成与它等底的圆锥体，已知圆柱的高是6厘米，那么揉成的圆锥体的高是多少厘米．
<gadget id="calculator">6 * 3</gadget>
<output>18</output>

<result>18</result>