Do not stomp on the ants. That just releases alarm pheromones that call in more ants for revenge. Do not use ant spray (the instant kill kind). It kills a few workers but makes the rest of the colony go nuclear and split into sub-nests.
7 ways to get rid of an ants nest - 'Go straight for the source
And please, for the love of all that is holy, do not pour gasoline into the nest and light a match. I know it sounds dramatic, but you will burn your house down. I’ve seen YouTube videos. It’s not worth it.