A cylindrical part with a base area of 18m**2 and a height of 5m is forged into a conical part with a base area equal to that of the cylindrical part. What is the height of the cone?
将一个底面积是18m**2，高5m的圆柱形零件，锻造成一个底面积与圆柱形零件相等的圆锥形零件，圆锥的高是多少？
<gadget id="calculator">5 * 3</gadget>
<output>15</output>

<result>15</result>