Convert from square mile to farthingdale

Unit Definition (square mile)
The square mile is a traditional unit of area. One square mile is equal to 640 acres, 3 097 600 square yards, 258.9988 hectares, or 2.589 988 square kilometers.

Unit Definition (farthingdale)
The Farthingdale is an older name for the rood, a unit of land area equal to 1/4 acre (0.1012 hectare). "Farthingdale," like "fardel," means a fourth part.