because that's the scale the map is drawn at...
1,000.
To answer that question, I would need the context which details a scale. If one inch on a scale equals 14 miles, that scale remains the same. So two inches (which equals 1 times 2) would translate into 28 miles (because 14 times 2 is 28). The same would hold true for 400 miles. If one inch equals 400 miles, two inches equals 800 miles, and three inches equals 1200 miles.
400 x 2.5 = 1000 miles
1,000 miles. 400+400=800+200=1,000
1,000 miles
One-and-a-half times 400
2.5 x 400 = 1,000 miles
1000.
Assuming you mean "two and a half inches"? The answer is 1000 miles
1000
1/400
If 400 miles is represented by 1 inch, then 2.5 inches represents 2.5 x 400 = 1000 miles.