How many bricks 3.75 in wide times wide x 8 in long are required to cover a patio 13 ft. 6 in wide by 18. 9 ft long

3.75 x 8 = 30 in (brick size)

13 x 12 = 156
156+6 = 162
18.9 x 12 = 226.8
226.8 x 162 = 36741.6 in (patio size)

36741.6 / 30 = 1224.72

You need 1224.72 bricks
(or round to 1225)