A classroom is 12 meters long, 8.5 meters wide, and 2.8 meters high. The area of doors, windows and blackboards is 26 square meters. How many square meters will the walls and roof need to be painted?
一间教室长12米，宽8.5米，高2.8米，门、窗户和黑板的面积是26平方米．需要粉刷四壁和屋顶的面积是多少平方米？
<result>190.08</result>