A classroom is 8 meters long, 6 meters wide, and 4 meters high (the area occupied by doors and windows is 22.8 square meters). Now it's time to paint the ceiling and walls of the classroom. 300 grams of paint is used per square meter. How many kilograms of paint will be used to paint this classroom?
一间教室长8米，宽6米，高4米(其中门窗所占面积是22.8平方米)．现在要粉刷教室的天花板和墙壁．每平方米要用涂料300克，粉刷这间教室一共要用涂料多少千克？
<result>41.16</result>