Qingfeng Packaging Company wants to produce a packaging box for telephones, which is in the shape of a cuboid with a length of 25 cm, a width of 15 cm, and a height of 5 cm. The company wants to design a cuboid packaging box that can hold 12 such telephones. Please design a packing box for this company, and save packing paper as much as possible. How many square centimeters of wrapping paper do you need for the package you design?
清风包装公司要生产一种电话机的包装盒，这种电话机为长方体外形，长25厘米，宽15厘米，高5厘米．公司要设计一个能装12部这种电话机的长方体包装盒．请你为该公司设计一种包装盒，要尽可能节省包装纸．你设计的包装盒至少需要多少平方厘米包装纸？
<gadget id="calculator">25 * 30</gadget>
<output>750</output>

<gadget id="calculator">30 * 30</gadget>
<output>900</output>

<gadget id="calculator">750 + 750 + 900</gadget>
<output>2_400</output>

<gadget id="calculator">2_400 * 2</gadget>
<output>4_800</output>

<result>4_800</result>