First you need to tell us what the units of your 8x4 blocks are. For example, feet, or inches.
810
10000 cm2 in one m2
1 cent = 40468 m2
There are about 46.15 acres in 186,764 m2
32
The answer depends on the units used for 8x4.
450 bricks.
The name "8x4" comes from the 32 characters of the active ingredient, Hexachloridhydroxydiphenylmethan.
81 m2
First you need to tell us what the units of your 8x4 blocks are. For example, feet, or inches.
810
32
10000 cm2 in one m2
1 cent = 40468 m2
29 of them. If you get 32, you won't have to cut any.
8x4=32