Assuming the measurements are also in feet, finding square feet is an easy multiplication. (I'm going to break it down so I can do it in my head) 12*14 = 12*12 + 12*2 = 144 + 24 = 168 sq ft
If the blocks are 12 inches x 12 inches then each block measures 1 square foot. An area of 14 feet x 14 feet has a surface area of 196 square feet, so it would require 196 of the 12" x 12" blocks to...