The abdomen is entered with a thin needle and the abdomen is inflated with carbon dioxide gas. A total of 4 trocars (cylindrical instruments attached to the abdominal wall) are entered into the abdomen and the process is started by transferring the image to the screen with the help of a camera. During the operation, the tube placed from the mouth to the stomach is taken as a guide, the stomach is cut upright and 80% of it is removed.