Aunt Li’s cabinet-type air conditioner is 0.7 meters long, 0.3 meters wide, and 1.7 meters high. In order to prevent dust, Aunt Li plans to make a cuboid cover with cloth to cover it. Please help her calculate how many square meters of cloth is needed?
李阿姨家的柜式空调长0.7米，宽0.3米，高1.7米，为了防灰尘，李阿姨准备用布做一个长方体套把它罩起来，请帮她算一下至少需要多少平方米的布？
<gadget id="calculator">0.7 * 0.3</gadget>
<output>0.21</output>

<gadget id="calculator">0.3 * 1.7</gadget>
<output>0.51</output>

<gadget id="calculator">1.7 * 0.7</gadget>
<output>1.19</output>

<gadget id="calculator">0.21 + 0.51 + 1.19</gadget>
<output>1.91</output>

<gadget id="calculator">1.91 * 2</gadget>
<output>3.82</output>

<gadget id="calculator">3.82 - 0.21</gadget>
<output>3.61</output>

<result>3.61</result>