To paint the walls and roof of a classroom with a length, width and height of 6.8 meters, 5.5 meters and 3 meters respectively (the area of windows, doors and blackboards is 30 square meters), the paint fee per square meter is 5.5 yuan, and the labor cost is 14.5 yuan , how much does it cost to paint this classroom?
粉刷一间长宽高分别是6.8米、5.5米.3米教室的墙壁和屋顶(窗户、门、黑板面积是30平方米)，如果刷每平方米涂料费要5.5元、人工费要14.5元，粉刷这间教室需要多少钱？
<gadget id="calculator">6.8 * 5.5</gadget>
<output>37.4</output>

<gadget id="calculator">6.8 * 3 * 2</gadget>
<output>40.8</output>

<gadget id="calculator">5.5 * 3 * 2</gadget>
<output>33</output>

<gadget id="calculator">33 - 30</gadget>
<output>3</output>

<gadget id="calculator">37.4 + 40.8 + 3</gadget>
<output>81.2</output>

<gadget id="calculator">5.5 + 14.5</gadget>
<output>20</output>

<gadget id="calculator">81.2 * 20</gadget>
<output>1_624</output>

<result>1_624</result>