The school needs to paint the perimeter and ceiling of the conference room with a length of 8m, a width of 6m, and a height of 4m. The area excluding the doors and windows is 20m**2. The paint needs to be 0.5 liters per square meter, and the paint is 20 yuan per liter. How much does it cost to paint the office?
学校要粉刷长8m，宽6m，高4m的会议室的四周和顶棚，除去门窗的面积20m**2，每平方米需要涂料0.5升，每升涂料20元，粉刷办公室一共需要多少钱？
<gadget id="calculator">8 * 6</gadget>
<output>48</output>

<gadget id="calculator">8 * 4</gadget>
<output>32</output>

<gadget id="calculator">6 * 4</gadget>
<output>24</output>

<gadget id="calculator">32 + 24</gadget>
<output>56</output>

<gadget id="calculator">56 * 2</gadget>
<output>112</output>

<gadget id="calculator">112 - 20</gadget>
<output>92</output>

<gadget id="calculator">48 + 92</gadget>
<output>140</output>

<gadget id="calculator">140 * 0.5 * 20</gadget>
<output>1_400</output>

<result>1_400</result>