Petukh i boyarin

Once upon a time there lived an old man and an old woman. They were very poor, they did not have any bread. One day they went to the forest and brought home acorns. And the old woman dropped one acorn underground. The acorn let go of the sprout and quickly grew to the floor. The old woman asked the old man to cut through the floor so that the oak tree would grow and collect the acorns from it. The old man cut a hole in the floor, and then in the roof. And the tree grew and grew, higher and higher.