John divorced his wife Marie, yet she won a custody battle over the children. Marie promised him that she would arrange visits between him and the kids. Marie never broke her promise to John, but he never got to see his kids.
Can you share 1/4 of a pie, 1/3 of a pie, 1/2 of a pie, 2/3 of a pie, 3/4 of a pie, and a whole pie so that two people have the same amount of pie without making any cuts?