Day County, South Dakota's area is 1,091 sq miles (2,826 km²).
Take 1091 times 640 and you get 698240 acres in Day County, SD.
Day County, SD covers a total area of 1,091 square miles equating to 698,240 acres.
South Dakota's total area (land and water) is 49,354,035.2 acres.
South Dakota's land area is 49,398,000 acres.
How many acres of farmland are there in Pennsylvania
The area of Mendocino County, CA is 2,481,900 acres.
Chippewa County's area is 645,120 acres.
Pike County, IL's area is 543,380 acres.
70,699.79 sq mi = 45,247,865.6 acres
Winnebago County, Wisconsin has a total area of 370,560 acres.
Somerset County, Maine covers 2,620,160 acres.
Vernon County, Wisconsin's area is 522,240 acres.
Jersey County, IL's area is 241,170 acres.