Aunt Li’s cabinet air conditioner (cuboid) is 0.4 meters long, 0.2 meters wide, and 2.0 meters high. In order to prevent dust, Aunt Li is going to make a cuboid cover with cloth to cover the air conditioner. Please do the calculation for her. What is the minimum square meter of cloth needed to make this cover? (0.1 square meters of shared cloth at the joint)
李大妈家的柜式空调(长方体)长0.4米，宽0.2米，高2.0米，为了防灰尘，李大妈准备用布做一个长方体套子把这台空调罩起来，请你帮她算一算，做这个套子至少需要多少平方米的布？(接头处共用布0.1平方米)
<gadget id="calculator">0.4 * 0.2</gadget>
<output>0.08</output>

<gadget id="calculator">0.4 * 2</gadget>
<output>0.8</output>

<gadget id="calculator">0.2 * 2</gadget>
<output>0.4</output>

<gadget id="calculator">0.8 + 0.4</gadget>
<output>1.2</output>

<gadget id="calculator">1.2 * 2</gadget>
<output>2.4</output>

<gadget id="calculator">0.08 + 2.4</gadget>
<output>2.48</output>

<gadget id="calculator">2.48 + 0.1</gadget>
<output>2.58</output>

<result>2.58</result>