Xiao Li kneads a cylindrical plasticine with a base radius of 3 cm and a height of 4 cm into a cone whose base is equal to the base of the cylinder. What is the height of the cone in centimeters.
小李把一块底面半径3厘米，高4厘米的圆柱形橡皮泥捏成一个底面与圆柱底面相等的圆锥．圆锥的高是多少厘米．
<gadget id="calculator">4 * 3</gadget>
<output>12</output>

<result>12</result>