Jerry is mowing a rectangular lawn which measures $77$ feet from north to south and $83$ feet from east to west. His lawn mower cuts a path that is $18$ inches wide. Jerry starts mowing by cutting a path from west to east across the north side of the lawn, then makes a right turn to cut a path along the east side of the lawn. He continues mowing by making right turns to mow a path along the next side each time he completes mowing a side. 

How many right turns will he make?

Let's think step by step and output the final answer within \boxed{}.
user