A cube with a side length of 5 decimeters is cut once along the up and down direction; twice along the left and right; and three times along the front and back. Cut the cube into 24 small cuboids of different sizes. Find the sum of the surface areas of these cuboids.
一个棱长为5分米的正方体，沿着上下方向切一刀；沿着左右切两刀；沿着前后切3刀．把这个正方体切成了24个大小不一的小长方体．求这些小长方体的表面积之和．
<gadget id="calculator">12 + 6</gadget>
<output>18</output>

<gadget id="calculator">5 * 5 * 18</gadget>
<output>450</output>

<result>450</result>