The cabinet-type air conditioner in Mr. Wang’s house is 0.6 meters long, 0.25 meters wide, and 1.8 meters high. In order to prevent dust, Mr. Wang plans to make a rectangular cover with cloth to cover the air conditioner. Please help her calculate, at least how many square meters of cloth is needed to make this cover? (A total of 0.2 square meters of cloth is required at the joint)
王老师家的柜式空调长为0.6米，宽为0.25米，高为1.8米，为了防灰尘，王老师准备用布做一个长方形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用布多少平方米？(接头处共需用布0.2平方米)
<gadget id="calculator">0.15 + 0.45 + 1.08</gadget>
<output>1.68</output>

<gadget id="calculator">1.68 * 2</gadget>
<output>3.36</output>

<gadget id="calculator">3.36 - 1.08</gadget>
<output>2.28</output>

<gadget id="calculator">2.28 + 0.2</gadget>
<output>2.48</output>

<result>2.48</result>