Is it permissible to pray while chewing gum is in the mouth (under the tongue), then continue chewing it after finishing the prayer?

A small amount of eating invalidates the prayer by consensus if done intentionally. However, if done forgetfully, a large amount invalidates it, but a small amount does not. Swallowing anything that dissolves in the mouth, such as sugar, is considered like eating. What a girl does by putting chewing gum in her mouth during prayer invalidates her prayer if she does it intentionally, because it is usually not free from the dissolution of some of it that reaches the stomach.