Six and one-half blocks.
Assumption: 6 x 6 is using inches as the unit (half a foot) and a 4 foot board means 4 square feet of board. Each square foot of board can be cut into four half foot x half foot pieces. Therefore, the 4 foot board would be able to make 16 half foot x half foot (6 inch x 6 inch) blocks.
6 blocks!
7 blocks
112
6
6 blocks above bedrock
216, 6 blocks wide, 6 blocks long, 6 blocks high. 6x6x6=216
How many blocks in 0.3 miles?
That really depends on the size of the blocks.
Answer About four neighborhood blocks equal a mile.
4