The length of a handicraft box is 3 decimeters, the width is 2 decimeters, and the height is 1 decimeter. Now pack 3 such handicraft boxes together (still a cuboid), think about how to pack the most economical wrapping paper ? And calculate the area of the wrapping paper used. (overlap is ignored)
一个工艺品盒的长是3分米，宽是2分米，高是1分米，现将3个这样的工艺品盒包装在一起，(仍为长方体)，想一想，怎样包装最省包装纸？并计算所用的包装纸的面积．(重叠处忽略不计)
<gadget id="calculator">3 * 2 * 2</gadget>
<output>12</output>

<gadget id="calculator">3 * 1 * 2</gadget>
<output>6</output>

<gadget id="calculator">2 * 1 * 2</gadget>
<output>4</output>

<gadget id="calculator">12 + 6 + 4</gadget>
<output>22</output>

<gadget id="calculator">22 * 3</gadget>
<output>66</output>

<gadget id="calculator">3 * 2 * 4</gadget>
<output>24</output>

<gadget id="calculator">66 - 24</gadget>
<output>42</output>

<result>42</result>