I get this when I type in your answer, which thank you by the way. "Sorry that's not correct. To simplify the problem, imagine that the wrapped post is cut lengthwise. When the post is pressed flat, the ribbon lies in straight segments, each of which is the hypotenuse of a right triangle." Also forgot to include the fact that the columns are cylindrical, if that matters or helps.
So I went at the problem that you just want to go around the columns 8 times not cover them. What you would do is find the circumfrence of the columns which is 2 multiply that by the number of times you want it wrapped, then multiply by the number of columns in the room which is 32