The cuboid wooden box (without a cover) used for selling rice in the grain shop is 1.2 meters long, 0.6 meters wide, and 0.8 meters high. How many square meters of wood boards should be used to make such a wooden box?
粮店售米用的长方体木箱(上面没有盖)，长1.2米，宽0.6米，高0.8米，制作这样一个木箱至少要用木板多少平方米？
<gadget id="calculator">1.2 * 0.6</gadget>
<output>0.72</output>

<gadget id="calculator">1.2 * 0.8 * 2</gadget>
<output>1.92</output>

<gadget id="calculator">0.6 * 0.8 * 2</gadget>
<output>0.96</output>

<gadget id="calculator">0.72 + 1.92 + 0.96</gadget>
<output>3.6</output>

<result>3.6</result>