The existing length, width and height are 8cm, 5cm, and 3cm in four small medicine boxes. Please design a large packing box so that it fits into these 4 small pill boxes. Please calculate how many square centimeters the box needs at least?
现有长宽高分别为8cm，5cm，3cm的小药盒四个．请你设计一个大的包装盒，使它正好装入这4个小药盒．请计算这个盒子至少需要多少平方厘米？
<gadget id="calculator">8 * 5</gadget>
<output>40</output>

<gadget id="calculator">8 * 12</gadget>
<output>96</output>

<gadget id="calculator">5 * 12</gadget>
<output>60</output>

<gadget id="calculator">40 + 96 + 60</gadget>
<output>196</output>

<gadget id="calculator">196 * 2</gadget>
<output>392</output>

<result>392</result>