A cuboid whose cross section is square has a surface area of 56 square decimeters and can be cut into three cubes of equal volume. By how many square decimeters does the surface area increase when the cube is cut?
一个横截面是正方形的长方体，它的表面积是56平方分米，能截成三个体积相等的立方体．截成立方体后表面积增加多少平方分米？
<gadget id="calculator">4 * 3</gadget>
<output>12</output>

<gadget id="calculator">12 + 2</gadget>
<output>14</output>

<gadget id="calculator">56 / 14</gadget>
<output>4</output>

<gadget id="calculator">2 * 2 * 4</gadget>
<output>16</output>

<result>16</result>