A classroom is 9 meters long, 6 meters wide, and 3 meters high. It is necessary to paint the ceiling and four walls of the classroom. The area excluding doors, windows and blackboards is 19.6 square meters. How many square meters is the painted area?
一间教室长9米，宽6米，高3米，要粉刷教室的天花板和四面墙壁，除去门窗和黑板的面积19.6平方米，粉刷的面积是多少平方米？
<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 - 19.6</gadget>
<output>16.4</output>

<gadget id="calculator">54 + 54 + 16.4</gadget>
<output>124.4</output>

<result>124.4</result>