64
I think perhaps 2250 blocks .
1.777777
50
A total of 50.
810
-198
132
66
12 x 12 blocks (assumed as 12 inch x 12 inch) That means the blocks are 1 square foot each Hence to cover 240 square feet area, you would need 240 blocks
Two measurements are indication of area. The area would be 144 square inches.
Assuming they are 8 inch*16 inch blocks, 144 square feet = 144*12*12 square inches. So number of blocks required = 144*12*12/(8*16) = 162