It seems like you may have some confusion with the numbers. Running 7 miles in one hour would imply a pace of 7 miles per hour (mph), and running 14 miles in two hours would imply a pace of 7 miles per hour as well.
Both results align, indicating a consistent speed of 7 mph for both periods of time you mentioned. If you meant to provide different distances or times, please clarify, and I'd be happy to help!