There are 4 identical pillars in the hall, the diameter of the bottom of the pillars is 2 meters, and the height is 4 meters. Paint these pillars, 0.6 kg of paint per square meter, how many kg of paint will be used in total?
大厅里有4根同样的柱子，柱子底面直径是2米，高4米．给这些柱子涂上油漆，每平方米用油漆0.6千克，一共要用多少千克油漆？
<gadget id="calculator">3.14 * 2 * 4 * 4 * 0.6</gadget>
<output>60.288</output>

<result>60.288</result>