Solve the all parts of following question given below:
Question: An acre a unit of land measurement still in wide use has a length of one furlong (1/8mi) and width one-tenth of its length.
Part A: How many acres are in 3 square miles?
Part B: How many square feet are inn3 acres?
Part C: An acre-foot is the fouling if water that would cover 1 after of flat land to depth of 1 foot. How many gallons are in 3 acre-foot?
Please help, completely confused!! Give steps if possible for above question.