One "section" of land as used througout the entire midwest and seen from any airplane when flying over the area in clear weather is one square mile or 640 acres. In other words it's a square with sides one mile long. So an area that was half a mile wide by 1-3/4 mile long would encompass something around 600 acres. One can also think of it in terms of square feet. An acre contains 40,000 square feet, and a square mile 640 times that or 25,600,000 square feet. Since a mile is 5280 feet long, a plot of land half a mile by 1-3/4 would contain 2640 ft x 9240 ft or 24,393,600 square feet which is 609.84 acres. Kelvin Kean Elverson, Chester County, Pennsylvania