The length of a classroom is 9 meters, the width is 6 meters, and the height is 3 meters. Now it is necessary to paint its walls and ceiling with white powder (the area of doors, windows and blackboards is 25 square meters). 4 yuan, how much does it cost to clean this classroom?
一间教室的长为9米，宽为6米，高为3米，现在要用大白粉粉刷它的四壁和顶棚，(门窗和黑板面积是25平方米)，如果每平方米用大白粉4元，刷这间教室共需多少元？
<gadget id="calculator">9 * 6</gadget>
<output>54</output>

<gadget id="calculator">9 * 3</gadget>
<output>27</output>

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

<gadget id="calculator">54 + 27 + 18</gadget>
<output>99</output>

<gadget id="calculator">99 * 2</gadget>
<output>198</output>

<gadget id="calculator">198 - 54 - 25</gadget>
<output>119</output>

<gadget id="calculator">119 * 4</gadget>
<output>476</output>

<result>476</result>