According to the formula: (length× width+width× height+length× height) ×2- length× width.

Namely: (31× 2727× 2.53/kloc-0 /× 2.5 )× 2-3/kloc-0 /× 27 =1886.5 (_? 0? 5)

Extended data:

Features of a cuboid:

(1) A cuboid has six faces. The reverse sides of each group are exactly the same.

(2) A cuboid has 12 sides, and four opposite sides are equal in length. According to the length, it can be divided into three groups, each group has four sides.

(3) A cuboid has eight vertices. Each vertex connects three edges. The three edges of a cuboid are called length, width and height.

(4) Two adjacent sides of a cuboid are perpendicular to each other.

Characteristics of the cube:

The (1) cube has eight vertices, and each vertex is connected with three sides.

(2) A cube has 12 sides, and each side has the same length.

(3) A cube has six faces, and each face has the same area.