There are 8 identical cylindrical wooden columns in the hall, each of which is 5 meters high, and the circumference of the bottom surface is 2.7 meters. If 4.5 square meters can be painted per kilogram of paint, how many kilograms of paint are needed to paint these wooden columns.
大厅内有8根同样的圆柱形木柱，每根高5米，底面周长是2.7米，如果每千克油漆可漆4.5平方米，漆这些木柱需油漆多少千克．
<gadget id="calculator">2.7 * 5</gadget>
<output>13.5</output>

<gadget id="calculator">13.5 * 8</gadget>
<output>108</output>

<gadget id="calculator">108 / 4.5</gadget>
<output>24</output>

<result>24</result>