Put two small cuboids whose length, width and height are 7dm, 6dm, and 5dm into a large cuboid with the smallest surface area. What is the surface area of this large cuboid in d㎡.
将两个长、宽、高都是7dm、6dm、5dm的小长方体，拼成一个表面积最小的大长方体，这个大长方体的表面积是多少d㎡．
<gadget id="calculator">7 * 6</gadget>
<output>42</output>

<gadget id="calculator">7 * 10</gadget>
<output>70</output>

<gadget id="calculator">6 * 10</gadget>
<output>60</output>

<gadget id="calculator">42 + 70 + 60</gadget>
<output>172</output>

<gadget id="calculator">172 * 2</gadget>
<output>344</output>

<result>344</result>