Use two identical small cuboids to form a large cuboid. Each small cuboid has a length of 12 cm, a width of 10 cm, and a height of 5 cm. What is the minimum surface area of the assembled cuboid?
用两个相同的小长方体拼成一个大长方体，每个小长方体长12厘米，宽10厘米，高5厘米，拼成的长方体表面积最小是多少平方厘米．
<gadget id="calculator">12 * 10</gadget>
<output>120</output>

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

<gadget id="calculator">10 * 5</gadget>
<output>50</output>

<gadget id="calculator">120 + 60 + 50</gadget>
<output>230</output>

<gadget id="calculator">230 * 2 * 2</gadget>
<output>920</output>

<gadget id="calculator">12 * 10 * 2</gadget>
<output>240</output>

<gadget id="calculator">920 - 240</gadget>
<output>680</output>

<result>680</result>