If you mean 198 sq ft, then 22 sqyds. If you mean a square 198 ft on a side then 4356 sqyds.
4 x 4 = 16 sqyds
32 x 32 x 3.14 = 3215.36 sqyds
7 x 3 ie 21 sqyds
(20 x 11)/9 sqyds... 20 feet x 11 feet = 220 square feet = 220/9 square yards = 24.444 square yards