7 and 7 is 11

A woman from Chelm went to the market one day to buy herring and a loaf of bread. "How much is it?" she asked the storekeeper. "14 cents," answered the storekeeper to the lady. "14 cents! For what?" asked the lady. The storekeeper explained: "The herring costs 7 cents, and the loaf of bread costs 7 cents also. So together it comes to 14 cents." "I know different. To the best of my recollection, 7 and 7 is 11." "What are you saying?" "As far as I know, 7 and 7 is 11. I had already had 4 children when my first husband died. When I married a second time, my second husband also had 4 children from his first wife. After getting married, we had 3 children together. So each of us had 7 children, and together we had 11! Obviously, 7 and 7 is 11."