It depends what you eat with them. If you eat a high fat high carb diet then the fats are stored along with the excess carbs in existing fat cells if they are not used for energy. If you eat a low carb high fat diet the fats are not stored, any excess are eliminated. Only carbs make fat, dietary fat does not make you fat. As a nutrition student you should be aware of the dangers of a high carb high fat diet, sugar kills, there is no mistake about that and all carbs are eventually broken down to the basic molecule of glucose and an excess of glucose causes a multitude of diseases. A diet that does not contain many carbs (they are actually not essential to the body's functioning, it goes on very well without them) can be relatively high in fat to provide just the amount for fat soluble vitamins, esential fatty acids and energy, no excess will be stored.

Hey something doesnt sound right about that "what to do"

i dont know your question but maybe its a trick question :p
when I person gains weight it is due to hyperplasia not enlargement of the actuall cells.