piece of "Smooth Good" brand soap is 8 cm long, 5 cm wide and 4 cm high. The shopping mall is carrying out promotional activities. Two pieces of the same soap are packaged together for sale. Please design, how can the packaging paper be saved the most? And calculate how many square centimeters of wrapping paper you need at least.
一块"舒肤佳"牌香皂长8厘米，宽5厘米，高4厘米，商场进行促销活动，把2块同样的香皂装在一起销售，请你设计一下，怎样才能最节省包装纸？并且算一算至少需要多少平方厘米包装纸．
<gadget id="calculator">4 * 2 * 5</gadget>
<output>40</output>

<gadget id="calculator">4 * 2 * 4 * 2</gadget>
<output>64</output>

<gadget id="calculator">5 * 4 * 2</gadget>
<output>40</output>

<gadget id="calculator">40 + 64 + 40</gadget>
<output>144</output>

<gadget id="calculator">144 * 2</gadget>
<output>288</output>

<result>288</result>