A flat-top classroom is 8 meters long, 6 meters wide, and 4.2 meters high. The doors, windows and blackboards in the classroom have a total area of 35.8 square meters. Paint the top and four walls of this classroom. How many square meters is the painted area?
一间平顶教室长8米，宽6米，高4.2米，教室里门窗和黑板面积共35.8平方米．给这间教室的顶面和四面墙壁粉刷涂料，粉刷的面积是多少平方米？
<gadget id="calculator">8 * 6</gadget>
<output>48</output>

<gadget id="calculator">8 * 4.2 * 2</gadget>
<output>67.2</output>

<gadget id="calculator">6 * 4.2 * 2</gadget>
<output>50.4</output>

<gadget id="calculator">50.4 - 35.8</gadget>
<output>14.6</output>

<gadget id="calculator">48 + 67.2 + 14.6</gadget>
<output>129.8</output>

<result>129.8</result>