The school wants to paint the surrounding walls and top surface of a new classroom (the bottom surface is not painted). It is known that the length of the classroom is 8m, the width is 6m, and the height is 3m. The area of the blackboard doors and windows is 11.4㎡. If the paint fee is 15 yuan per square meter, how much is the paint cost for painting this classroom?
学校要粉刷一间新教室的四周墙壁和顶面(底面不刷)．已知教室的长是8m，宽是6m，高是3m，扣除黑板门窗的面积11.4㎡，如果每平方米需要花15元的涂料费，粉刷这个教室要花涂料费多少元？
<gadget id="calculator">8 * 6</gadget>
<output>48</output>

<gadget id="calculator">8 * 3</gadget>
<output>24</output>

<gadget id="calculator">6 * 3</gadget>
<output>18</output>

<gadget id="calculator">24 + 18</gadget>
<output>42</output>

<gadget id="calculator">42 * 2</gadget>
<output>84</output>

<gadget id="calculator">84 - 11.4</gadget>
<output>72.6</output>

<gadget id="calculator">48 + 72.6</gadget>
<output>120.6</output>

<gadget id="calculator">120.6 * 15</gadget>
<output>1_809</output>

<result>1_809</result>