There is a cylindrical hollow cement advertising column standing at the intersection of the highway. The diameter of the bottom surface is 1.2 meters and the height is 2 meters. Its surface is painted with red paint. It is estimated that every kilogram of paint can cover 2.4 square meters. After painting this column, it needs to be painted. How many kilograms? (Consider which surfaces should be painted according to the actual life)
有一个立于公路路口的圆柱形中空水泥广告柱，底面直径是1.2米，高2米，将它的表面涂上红色油漆，估计每千克油漆可以涂2.4平方米，涂完这根柱子需要油漆多少千克？(根据生活实际考虑好哪些面用涂油漆)
<gadget id="calculator">2 / 2.4</gadget>
<output>0.833333</output>

<gadget id="calculator">3.14 * 1.2 * 0.833333</gadget>
<output>3.139999</output>

<result>3.139999</result>