If you ate an excesive amount of calories, with no physical activity including healing, then probably yes. Although you would have to take the calories in a solution because if you tried to eat that much more you would probably lose alot when you got sick or exploded :P Alot would also be flushed.

It's not that exact of a number though of course. Every one has different basal metobolic rates, different ways of handling calories, and so on. Plus the carbs would attract more water weight, meaning 7,000 extra calories worth of carbs would add more weight then 7,000 extra calories of fat. A high carb count would also mean more insulin produced, hence more storage, while a higher fat count would probably reult in more being flushed when not needed.

There are situations where a person may need more calories though. Burn victims and other people with massive healing to do need a ton more calories to support the energy it takes to heal on top of what it takes to keep the body functioning normally.