well 7 yards is 21 feet but I'm not sure what this question was asking for, repost with better grammar.
There are 7 yards in 3 yards and 12 feet. There are 3 feet in a yard. So, 12 feet would be 4 yards. Added to the existing 3 yards, you get 7 total yards.
If there are eight yards total, and you need to know how many yards there are, then count them. 1, 2, 3, 4, 5, 6, 7, 8. There are eight yards in eight yards.
14 yards are in 7 acres
12320 yards in 7 miles.
There are: (7*1760) +800 = 13,120 yards
2.33 yards.
Total surface area... 276 square yards.
7 marlas = 211.75 sq yards.
There are 2.5 yards in 7 and a half feet.
2 yards, 1 foot, and 7 inches
There are 21 feet in 7 yards, not yeards.
7 yards is 21 feet.