The area of the whole front yard is 200 feet by 50 feet, or 200 ft * 50 ft = <<200*50=10000>>10,000 sq.ft.
The sidewalk is 3 feet by 50 feet, or 3ft * 50ft = <<3*50=150>>150 sq.ft.
Each of the flower beds right in front of the house is 4 feet by 25 feet, or 4 ft * 25 ft = 100 sq.ft. There are two, so that's 2 * 100 sq.ft. = 200 sq.ft.
The third flower bed is 10 feet by 12 feet, or 10ft * 12ft = <<10*12=120>>120 sq.ft.
The fourth flower bed is 7 feet by 8 feet, or 7ft * 8ft = <<7*8=56>>56 sq.ft.
The total area of the sidewalk and flower beds is 150 sq.ft + 200 sq.ft + 120 sq.ft + 56 sq.ft = <<150+200+120+56=526>>526 sq. ft.
So Jill will need a total of 10,000 sq.ft - 526 sq.ft = <<10000-526=9474>>9,474 sq.ft. of sod.
#### 9474