A classroom is 9 meters long, 6 meters wide, and 3 meters high. It is necessary to paint the roof and four walls of the classroom, and the area of doors, windows and blackboards is 25.4 square meters. How many square meters is the painting area?
一间教室长9米，宽6米，高3米．要粉刷教室的屋顶和四面墙壁，出去门窗和黑板面积25.4平方米，粉刷面积是多少平方米？
<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">27 + 18</gadget>
<output>45</output>

<gadget id="calculator">45 * 2</gadget>
<output>90</output>

<gadget id="calculator">90 - 25.4</gadget>
<output>64.6</output>

<gadget id="calculator">54 + 64.6</gadget>
<output>118.6</output>

<result>118.6</result>