There are 4 identical cuboid pillars on the first floor of a certain teaching building. The length and width of these pillars are 5 decimeters, and the height is 4 meters. Now we need to paint around these pillars. If 0.5 kg of paint is needed per square meter, how much paint is needed in total? kilogram?
某教学楼一楼有4个同样的长方体柱子，这些柱子长和宽都是5分米，高4米，现在要把这些柱子四周粉刷涂料，如果每平方米需要涂料0.5千克，一共需要涂料多少千克？
<gadget id="calculator">0.5 * 4 * 4 * 4</gadget>
<output>32</output>

<gadget id="calculator">32 * 0.5</gadget>
<output>16</output>

<result>16</result>