The school has to paint the classrooms. The length of the book classroom is 9m, the width is 6m, and the height is 3m. The area after deducting the doors and windows is 12.3m**2. If it costs 5 yuan to paint per square meter, how much will it cost to paint the classroom?
学校要粉刷教室．书籍教室的长是9m，宽是6m，高是3m，扣除门窗的面积是12.3m**2，如果每平方米需要花5元涂料，粉刷这个教室需要花费多少元？
<gadget id="calculator">9 * 6</gadget>
<output>54</output>

<gadget id="calculator">9 * 3 * 2</gadget>
<output>54</output>

<gadget id="calculator">6 * 3 * 2</gadget>
<output>36</output>

<gadget id="calculator">36 - 12.3</gadget>
<output>23.7</output>

<gadget id="calculator">54 + 54 + 23.7</gadget>
<output>131.7</output>

<gadget id="calculator">131.7 * 5</gadget>
<output>658.5</output>

<result>658.5</result>