An acre originally was defined as the amount of land that an oxen team could plow in a day.14 Suppose a team could plow 0.4 hectare per day, where a hectare is 104 m². There are 1609 meters in a mile. How many acres are there in a square mile?

Assume that on the surface of the Earth, g = 9.81 m/s² = 32.2 ft/s² (i.e., each to three significant figures). Make sure you are reporting the solution to the proper number of significant figures.