That depends on whether you are measuring in Brooklyn blocks or in Manhattan blocks.
You finish 2 blocks east and 8 blocks south of your starting point.
20 North/South blocks
There are approximately 13 North/South blocks to a mile in OKC and approximately 9 East/West blocks to a mile in OKC. I measured it on Google Maps
East to West - 16 North to South - 8
About half a mile. In New York City, about 17 to 20 street blocks (north/south blocks) equals a mile, and about 5 to 10 avenue blocks (east/west blocks) equals a mile.
You would have to walk 10 blocks south and then 5 blocks west or something like that for example 3 blocks west then 5 blocks south then 2 blocks west then 5 blocks south again but it all adds up to be a total of 15 blocks.
2 blocks south
To complete the circle you would have to walk 10 blocks south and 1 block east to return to your starting point, 11 blocks.
In large cities the number varies depending upon the original grid layout. In NYC (Manhattan) the number of north-south blocks per mile is 20. East-west blocks (between avenues) are typically just under 5 north-south blocks in length, so the number of east-west blocks per mile is 4.
About a mile and a half. Approximately 17 to 20 street blocks (north/south blocks) equals a mile, and approximately 5 to 10 avenue blocks (east/west blocks) equals a mile.
It's a total of seven blocks... You would need to walk 5 blocks south, and 2 blocks east to end at your original starting place !
Oh, dude, you're really testing my math skills here. Okay, so one mile is equal to 5,280 feet, and a typical city block is around 330 feet, so if we do the math, that's like 16 city blocks in a mile. But hey, who's counting, right?