How is the inheritance divided among three uterine brothers and one full sister?

If the deceased leaves behind only a full sister and uterine brothers, the full sister receives one-half as a prescribed share (fard), based on the Almighty's saying: "If a man dies, and he has no child but has a sister, then she will have half of what he leaves." The uterine brothers receive one-third divided equally among them, based on the Almighty's saying: "but if they are more than that, they share in one-third." Then the remainder is returned to them. The inheritance is then divided into fifteen shares: nine shares for the full sister as her prescribed share and return, and six shares for the uterine brothers as their prescribed share and return, with each of them receiving two shares.