After cutting a cube with a side length of 3 cm into two identical cuboids, the surface area of the two cuboids is greater than the surface area of the original cube by how many cm**2.
把一个棱长3cm的正方体切成两个完全一样的长方体后，两个长方体的表面积比原来正方体的表面积多多少cm**2．
<gadget id="calculator">3 * 3 * 2</gadget>
<output>18</output>

<result>18</result>