Domain: geography (Route Planning and Navigation)
Problem: I plan to drive from Gillette to Pierre, but I have asthma and am very sensitive to air pollution, so I do not want to enter areas with air pollution (the yellow, orange, and red areas on the map). Please help me plan a perfect route that completely bypasses polluted areas and is the fastest option, and then tell me the total distance of this route in miles.(Round to the nearest integer)
Answer: 615 miles