The store is going to make a glass counter with a length of 2 meters, a width of 40 cm, and a height of 20 cm. Now it needs to inlay aluminum bars on all sides of the counter. How many meters of aluminum bars are needed for this counter?
商店要做一个长2米、宽40厘米、高20厘米的玻璃柜台，现在要在柜台的各边镶上铝条，这个柜台需要多少米的铝条？
<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">2 + (2/5) + (1/5)</gadget>
<output>13/5 = around 2.6</output>

<gadget id="calculator">(13/5) * 2</gadget>
<output>26/5 = around 5.2</output>

<result>26/5 = around 5.2</result>