classroom is 8 meters long, 6 meters wide, and 3 meters high. It is necessary to paint the walls and ceiling of the classroom. If the area of the doors and windows is 22 square meters, and the average paint is 0.25 kilograms per square meter, you can earn 25 yuan per kilogram of paint. How much do you earn?
一间教室长8米、宽6米、高3米，要粉刷教室的墙壁和天花板，如果门窗的面积是22平方米，并且平均每平方米用涂料0.25千克，每千克涂料赚25元，一共赚多少元？
<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 - 22</gadget>
<output>62</output>

<gadget id="calculator">48 + 62</gadget>
<output>110</output>

<gadget id="calculator">110 * 0.25 * 25</gadget>
<output>687.5</output>

<result>687.5</result>