There are 10 concrete block per m2.
90 * 140 acres = 50,990 390.9 m2
140 m2
13 m2
50
10000 cm2 in one m2
1 cent = 40468 m2
complete: 1300cm2=------M2
There are about 46.15 acres in 186,764 m2
1000 m2 = 0.247 acres
5000 m2 is 1.24 acres.
If it has one, it'll attach to the engine at the bottom of the oil pan, and, on some engines, the right side of the block.