To keep the dust out of the house, Mingming's mother is going to make a cuboid cloth cover to cover her cabinet air conditioner from top to bottom. The air conditioner is 0.5 meters long, 0.4 meters wide, and 2.2 meters high. So, at least how many square meters of fabric is needed to make this cloth cover. (A total of 0.2 square meters of fabric is required for all joints)
为了房灰尘，明明的妈妈准备做一个长方体的布罩把她家的柜式空调从上向下罩起来，这个空调的长0.5米，宽0.4米，高2.2米．那么，做这个布罩至少需要多少平方米的布料．(所有接头处一共需要布料0.2平方米)
<gadget id="calculator">0.5 * 0.4</gadget>
<output>0.2</output>

<gadget id="calculator">0.5 * 2.2</gadget>
<output>1.1</output>

<gadget id="calculator">0.4 * 2.2</gadget>
<output>0.88</output>

<gadget id="calculator">0.2 + 1.1 + 0.88</gadget>
<output>2.18</output>

<gadget id="calculator">2.18 * 2</gadget>
<output>4.36</output>

<gadget id="calculator">4.36 - 0.2</gadget>
<output>4.16</output>

<gadget id="calculator">4.16 + 0.2</gadget>
<output>4.36</output>

<result>4.36</result>