An auditorium is 20 meters long, 15 meters wide, and 8 meters high. It is necessary to paint the roof and four walls of the auditorium. Excluding the door and window area of 120 square meters, the average paint used per square meter is 3 kilograms, and there is (1/10) loss in actual painting. , How many kilograms of paint are needed to paint this auditorium?
一个礼堂长20米，宽15米，高8米，要粉刷礼堂的顶和四壁，除去门窗面积120平方米，平均每平方米用涂料3千克，实际粉刷时有(1/10)的损耗，粉刷这个礼堂共需涂料多少千克？
<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 + (1/10)</gadget>
<output>11/10 = around 1.1</output>

<gadget id="calculator">2_520 * (11/10)</gadget>
<output>2_772</output>

<result>2_772</result>