The length of a conference room is 12 meters, the width is 8 meters, and the height is 4 meters. The flat roof and four walls of the conference room need to be painted, and the area of doors and windows is 28.5 square meters. How many square meters is the painted area?
一间会议室的长是12米，宽是8米，高是4米，要粉刷会议室的平顶和四面墙壁，除去门窗面积28.5平方米，粉刷的面积是多少平方米？
<gadget id="calculator">12 * 8</gadget>
<output>96</output>

<gadget id="calculator">12 * 4</gadget>
<output>48</output>

<gadget id="calculator">8 * 4</gadget>
<output>32</output>

<gadget id="calculator">48 + 32</gadget>
<output>80</output>

<gadget id="calculator">80 * 2</gadget>
<output>160</output>

<gadget id="calculator">160 - 28.5</gadget>
<output>131.5</output>

<gadget id="calculator">96 + 131.5</gadget>
<output>227.5</output>

<result>227.5</result>