How Many Concrete Blocks Do I Need To Build A 4 Foot Tall By 40 Feet Long Wall?

Multiply height by 1.5 (4 x 1.5 = 6) 6 rows
Multiply wall length by .75 (40 x .75 = 30) 30 blocks long
6 x 30 = 180 number of blocks needed ( 8" x 16" blocks )

3 bags of mortar per 100 block

How many concrete blocks do I need to build a wall 140 feet long by 8 foot high?