How does a person eat after surgery for stomach cancer?

Eventually normal. If only a small amount of stomach is removed at surgery there will be little effect on eating. However, if most or all of the stomach is removed, a patient will need to eat several small meals a day, for example 6 small meals instead of the usual 3 meals. Over time, the bowel will stretch to accommodate larger meals.
Think small portions. Even tiny meals may make you feel uncomfortably full. If you have had part of your stomach removed, it will not stretch as much as it did before. If you have had all your stomach taken away, the small bowel will need to stretch to take larger amounts of food. You will need to eat very small amounts very often at first. Then, gradually increase the amounts and then the time between meals.