A living room is 8 meters long, 3 meters high, and 4 meters wide. It is necessary to paint the ceiling and surroundings of the living room. The area excluding the doors and windows is 20 square meters. How many square meters is the painted area?
一间客厅长8米，高3米，宽4米，要粉刷这个客厅的顶和四周，除去门窗的面积20平方米，粉刷的面积是多少平方米？
<gadget id="calculator">8 * 4</gadget>
<output>32</output>

<gadget id="calculator">4 * 3 * 2</gadget>
<output>24</output>

<gadget id="calculator">8 * 3 * 2</gadget>
<output>48</output>

<gadget id="calculator">48 - 20</gadget>
<output>28</output>

<gadget id="calculator">32 + 24 + 28</gadget>
<output>84</output>

<result>84</result>