Aunt Zeng’s cabinet air conditioner is 0.4 meters long, 0.3 meters wide, and 1.6 meters high. In order to prevent dust, Aunt Zeng plans to make a cuboid cover with cloth to cover the air conditioner. Please do the calculation for her and make this one How many square meters of cloth is needed for the cover at least? (A total of 0.2 square meters of cloth is required at the joints).
曾阿姨家的柜式空调长0.4米，宽0.3米，高1.6米，为了防灰尘，曾阿姨准备用布做一只长方体套子把这台空调罩起来，请你帮她算一下，做这只套子至少需用多少平方米的布？(接头处共需用布0.2平方米)．
<gadget id="calculator">0.4 * 0.3</gadget>
<output>0.12</output>

<gadget id="calculator">0.4 * 1.6</gadget>
<output>0.64</output>

<gadget id="calculator">0.3 * 1.6</gadget>
<output>0.48</output>

<gadget id="calculator">0.64 + 0.48</gadget>
<output>1.12</output>

<gadget id="calculator">1.12 * 2</gadget>
<output>2.24</output>

<gadget id="calculator">0.12 + 2.24 + 0.2</gadget>
<output>2.56</output>

<result>2.56</result>