For 80 square feet you will need a 360 4" x 8" bricks.
I use about 28-30 for that.
1x32, 2x16, 4x8
You will need exactly 1013 bricks so unless you already included some overage in the sq. ft. I would buy 1100 so that you have extra for cuts, if you're planning to lay a more complicated pattern such as herringbone you might need even more. Hope this helps.
12 -4x8 sheets
To determine the number of 4x8 pavers in a square foot, you first need to calculate the area of one paver, which is 4x8 = 32 square inches. Since there are 144 square inches in a square foot, you divide 144 by 32 to get 4.5. Therefore, you can fit approximately 4.5 4x8 pavers in one square foot.
1 square foot 12X12 = 144 square inches Brick 4x8= 32 square inches 200x144 divided by 32 = 900 Brick
20
324
1980
144
About 94 sheets if 4x8.
20
96
A 30 foot circle covers about 707 square feet. 23 pieces would technically cover that. I'd get 30 of them so I wouldn't have to cut any of them.
The answer depends on the units used for 4x8 which are unspecified. The answer will vary according to whether those units are inches, metres, parsecs, etc.
104 sq feet = 104*12*12 square inches which will require 104*12*12/(4*8) = 468 bricks.