There are 4 tapes, each tape is 10 cm long, 7 cm wide, and 2 cm high. Please design a suitable packaging method to make the packaging more paper-saving (the overlap is negligible), and calculate how many square centimeters of packaging paper are needed in total?
有4盒磁带，每盒磁带长10厘米、宽7厘米、高2厘米．请你设计合适的包装方式，使得包装更省纸(重叠处忽略不计)，并算出一共需要包装纸多少平方厘米？
<gadget id="calculator">10 * 7</gadget>
<output>70</output>

<gadget id="calculator">10 * 8</gadget>
<output>80</output>

<gadget id="calculator">7 * 8</gadget>
<output>56</output>

<gadget id="calculator">70 + 80 + 56</gadget>
<output>206</output>

<gadget id="calculator">206 * 2</gadget>
<output>412</output>

<result>412</result>