A classroom is 8 meters long, 6 meters wide, and 3.5 meters high. The walls and ceiling need to be painted. Excluding doors and windows of 23 square meters, what is the area to be painted?
一间教室长8米，宽6米，高3.5米，要粉刷四壁和顶棚，除去门窗23平方米，要粉刷的面积是多少？
<gadget id="calculator">49 - 23</gadget>
<output>26</output>

<gadget id="calculator">48 + 26</gadget>
<output>74</output>

<result>74</result>