A classroom with a length of 8 meters, a width of 5 meters, and a height of 3 meters has an area of 12m**2 except for doors and windows, and the walls are painted with paint. If you have to pay 28 yuan per square meter for paint, how much is the total cost?
一间长8米、宽5米、高3米的教室，除去门窗面积12m**2，四面墙壁涂油漆．如果每平方米要付油漆28元，一共需要多少元钱？
<gadget id="calculator">8 * 3</gadget>
<output>24</output>

<gadget id="calculator">5 * 3</gadget>
<output>15</output>

<gadget id="calculator">24 + 15</gadget>
<output>39</output>

<gadget id="calculator">39 * 2</gadget>
<output>78</output>

<gadget id="calculator">78 - 12</gadget>
<output>66</output>

<gadget id="calculator">66 * 28</gadget>
<output>1_848</output>

<result>1_848</result>