A cylindrical iron block with a base area of 3.14 square decimeters and a height of 4 decimeters is melted and cast into a cone. It is known that the radius of the bottom surface of the conical iron block is 2 decimeters, so how many decimeters is its height?
将底面积是3.14平方分米，高4分米的圆柱形铁块熔铸成一个圆锥．已知圆椎铁块的底面半径是2分米，那么它的高是多少分米？
<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">3.14 * 4</gadget>
<output>12.56</output>

<gadget id="calculator">3 / 12.56</gadget>
<output>0.238854</output>

<gadget id="calculator">3.14 * 4 * 0.238854</gadget>
<output>3.000006</output>

<result>3.000006</result>