A box of American ginseng lozenges is in the shape of a cuboid, with a length of 10 cm, a width of 8 cm, and a height of 2 cm. Pack 10 boxes of American ginseng lozenges together to form a large cuboid, called a piece. How can it be packed? How much wrapping paper is needed for each wrapping method? (overlapping of wrappers is ignored)
一盒洋参含片的形状是长方体，它的长10厘米，宽8厘米，高2厘米．把10盒洋参含片包装在一起形成一个大长方体，称为一条．可以怎样包装？每一种包装方法需要多少包装纸？(包装纸的重叠部分忽略不计)
<gadget id="calculator">16 * 10 * 2</gadget>
<output>320</output>

<gadget id="calculator">10 * 10 * 2</gadget>
<output>200</output>

<gadget id="calculator">320 + 200 + 320</gadget>
<output>840</output>

<result>840</result>