The wall on the right side of the classroom is 8m long and 4m wide. There are 2 windows on the wall. The area of each window is 5 square meters. If this wall is to be painted, how many square meters should be painted?
教室右面的墙长8m，宽4m，墙上有2扇窗户，每户窗户的面积是5平方米，如果粉刷这面墙，要粉刷的面积是多少平方米？
<gadget id="calculator">8 * 4</gadget>
<output>32</output>

<gadget id="calculator">5 * 2</gadget>
<output>10</output>

<gadget id="calculator">32 - 10</gadget>
<output>22</output>

<result>22</result>