Knead a cylinder of plasticine with a radius of 4 cm and a length of 12 cm to form a cone with the same base as it. What is the height of the cone in cm?
把一块半径4厘米，长12厘米的圆柱体橡皮泥捏成一个与它等底的圆锥，圆锥的高是多少厘米？
<gadget id="calculator">12 * 3</gadget>
<output>36</output>

<result>36</result>