The canteen is going to make a glass counter with a length of 2.2m, a width of 40cm and a height of 80cm. Now it is necessary to install angle irons on all sides of the counter. How many meters of angle irons are needed for this counter?
小卖部要做一个长2.2m，宽40cm，高80cm的玻璃柜台，现要在柜台各边都安上角铁，做好这个柜台要多少米的角铁？
<gadget id="calculator">2.2 * 100</gadget>
<output>220</output>

<gadget id="calculator">220 + 40 + 80</gadget>
<output>340</output>

<gadget id="calculator">4 / 100</gadget>
<output>1/25 = around 0.04</output>

<gadget id="calculator">340 * (1/25)</gadget>
<output>68/5 = around 13.6</output>

<result>68/5 = around 13.6</result>