There are 6 cylindrical pillars with a base diameter of 0.6 meters and a height of 5 meters in a conference hall. Now they need to be painted with 0.5 kilograms of paint per square meter. How many kilograms of paint should be used to paint these pillars?
一个会议大厅里有6根底面直径0.6米，高5米的圆柱形柱子，现在要刷上油漆，每平方米用油漆0.5千克，刷这些柱子要用油漆多少千克？
<gadget id="calculator">3.14 * 0.6 * 5 * 6</gadget>
<output>56.52</output>

<gadget id="calculator">0.5 * 56.52</gadget>
<output>28.26</output>

<result>28.26</result>