How would you set this up, I get confused converting

Question

A proposed oil pipeline will cross 16.8 miles of national forest. The width of the land needed for the pipeline is 200 feet. If the Forest Service charges the oil company $32 per acre, calculate the total cost.

(1 mile equals 5280 feet and 1 acre equals 43,560 square feet.)

Answer 1

16.8 miles x 5280 feet = 88,704 feet long

 

88,704 x 200 = 17,740,800 ft² of land needed.

 

17,740,800/43,560 = 407.27 acres

 

407.27 x 32 = 13,032.72