Submerge a conical iron block and a cylindrical iron block with equal bottoms successively in a cuboid container filled with water. After putting the conical iron block, the water level rises by 2 cm. After putting the cylindrical iron block, the water level rises by another 2 cm. It is known that the height of the cone is 12 cm, what is the height of the cylinder?
把底面相等的一块圆锥形铁块和圆柱形铁块先后浸没在盛水的长方体容器中，放入圆锥铁块后，水面上升了2cm，放入圆柱形铁块后，水面又上升了2cm，已知圆锥高12cm，那么圆柱高多少？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">12 * (1/3)</gadget>
<output>4</output>

<result>4</result>