The sum of interior angles of a polygon is 5040 calculate the polygons number of sides

If there are n sides, the angles sum to (n-2)*180

so, solve for n in
180(n-2) = 5040

for an n-gon, sum of interior angles = 180(n-2)

180(n-2) = 5040
n-2 = 28
n = 30

state your conclusion.