Our classroom is 8.5 meters long, 6 meters wide and 4.5 meters high. The classroom doors, windows and blackboards have a total area of 36.4 square meters. How many square meters will be painted on the top and four walls of the classroom?
我们的教室长8.5米，宽6米，高4.5米．教室门窗和黑板的面积一共有36.4平方米．要粉刷教室的顶面和四面墙壁，粉刷的面积有多少平方米？
<gadget id="calculator">8.5 * 4.5</gadget>
<output>38.25</output>

<gadget id="calculator">6 * 4.5</gadget>
<output>27</output>

<gadget id="calculator">38.25 + 27</gadget>
<output>65.25</output>

<gadget id="calculator">2 * 65.25</gadget>
<output>130.5</output>

<gadget id="calculator">8.5 * 6</gadget>
<output>51</output>

<gadget id="calculator">51 - 36.4</gadget>
<output>14.6</output>

<gadget id="calculator">130.5 + 14.6</gadget>
<output>145.1</output>

<result>145.1</result>