A classroom is 8 meters long, 6 meters wide, and 4 meters high. The surrounding walls and ceiling need to be painted, and the area of doors and windows is 16 square meters. How many square meters is the painted area?
一间教室长8米，宽6米，高4米，要粉刷四周墙壁和顶棚，除去门窗面积16平方米，粉刷的面积是多少平方米？
<gadget id="calculator">48 - 18</gadget>
<output>30</output>

<gadget id="calculator">48 + 64 + 30</gadget>
<output>142</output>

<result>142</result>