A circle of trademark paper is stuck around a rectangular food box with a length of 1 decimeter, a width of 8 centimeters and a height of 1.5 decimeters, and the area of the trademark joint part is 1 square centimeters. this problem is equivalent to finding its surface area:

① 1dm = 1cm

② 1.5dm = 15cm

③ (1× 5+8× 5 )× 2 = 18cm?

④18+1=28cm?

hope to adopt it ~