The naughty room is 5 meters long, 3.6 meters wide and 3 meters high. To put wallpaper on the four walls of the room, the area excluding doors and windows is 5.6 square meters. If the price of wallpaper per square meter is 80 yuan, how much is the minimum cost?
淘气的房间长5米，宽3.6米，高3米．要在房间的四壁贴壁纸，除去门窗的面积5.6平方米，若每平方米壁纸售价80元，至少需要多少元钱？
<gadget id="calculator">5 * 3</gadget>
<output>15</output>

<gadget id="calculator">3 * 3.6</gadget>
<output>10.8</output>

<gadget id="calculator">15 + 10.8</gadget>
<output>25.8</output>

<gadget id="calculator">25.8 * 2</gadget>
<output>51.6</output>

<gadget id="calculator">51.6 - 5.6</gadget>
<output>46</output>

<gadget id="calculator">46 * 80</gadget>
<output>3_680</output>

<result>3_680</result>