If a cuboid with a length of 3 cm, a width of 1 cm and a height of 1 cm is cut into 3 identical cubes, the sum of the surface areas is greater than the original by how many square centimeters.
把一个长为3厘米，宽和高都为1厘米的长方体切成3个相同的正方体，表面积之和比原来多了多少平方厘米．
<gadget id="calculator">1 * 1 * 4</gadget>
<output>4</output>

<result>4</result>