The columns on both sides of the gate of the Children's Palace are 4 meters high and the bottom surface is 60 cm in diameter. During construction, each column needs to be painted with about 0.2 kilograms of paint per square meter. How many kilograms of paint should be used at least for each cylinder?
少年宫大门的两侧的圆柱高4米，底面直径60厘米，建造时要给每个柱子刷油漆，每平方米大约要油漆0.2千克．每个圆柱至少要用油漆多少千克？
<gadget id="calculator">3.14 * 0.6 * 4</gadget>
<output>7.536</output>

<gadget id="calculator">0.2 * 7.536</gadget>
<output>1.5072</output>

<result>1.5072</result>