The multimedia classroom of Chaoyang Primary School is 36 meters long, 10 meters wide and 3 meters high. Now it is decided to repaint the ceiling and surrounding walls during the summer vacation. It is known that the area of doors and windows occupies 120 square meters. If you need to use 0.5 liters of paint per square meter in the first painting, you can save (1/5) in the second painting compared with the first painting. There is still a 10% loss rate during the actual painting. Please calculate how many liters of paint need to be purchased in total?
朝阳小学多媒体教室的长是36米，宽10米，高3米．现决定趁暑假给天花板和四围的墙壁重新粉刷，已知门窗面积占120平方米．若第一遍粉刷时每平方米需用涂料0.5升，第二遍粉刷时比第一遍节约(1/5)．实际粉刷时还有10%的损耗率，请你算一下，共需购买涂料多少升？
<gadget id="calculator">36 * 10</gadget>
<output>360</output>

<gadget id="calculator">36 * 3 * 2</gadget>
<output>216</output>

<gadget id="calculator">10 * 3 * 2</gadget>
<output>60</output>

<gadget id="calculator">60 - 120</gadget>
<output>-60</output>

<gadget id="calculator">360 + 216 + (-60)</gadget>
<output>516</output>

<gadget id="calculator">516 * 0.5</gadget>
<output>258</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">516 * 0.5 * (4/5)</gadget>
<output>206.4</output>

<gadget id="calculator">258 + 206.4</gadget>
<output>464.4</output>

<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 - (1/10)</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">464.4 / (9/10)</gadget>
<output>516</output>

<result>516</result>