Do beans lose calories when cooked?

Recently I bought canned beans, because it's a lot faster to make them, it say 100g has 53kcal, as for beans that weren't pre-cooked says 277kcals in 100gramms. How can this be? :S

Cooking grains-legumes changes the nutritional density, probably from added water that enters the cells, therefore you have extra weight without calories-nutrition. You may notice this when you soak grains, they often double in size (or even more) because of absorbed water.

As bluebabe said, probably those 100g are including the water/liquid inside of the can, not the beans themselves