The canteen is going to make a glass counter with a length of 2.2 meters, a width of 4 meters, and a height of 8 meters. Angle irons are installed on each side. How many meters of angle irons are needed for this counter?
小卖部要做一个长2.2米，宽4米，高8米的玻璃柜台各边都安上角铁，这个柜台需要多少米角铁？
<gadget id="calculator">2.2 + 4 + 8</gadget>
<output>14.2</output>

<gadget id="calculator">14.2 * 4</gadget>
<output>56.8</output>

<result>56.8</result>