What is the share of each heir from the estate of the deceased mother?

After settling debts and fulfilling bequests, the inheritance is divided between the son and his two full sisters, with the male receiving the equivalent of the share of two females, in accordance with the Almighty's saying: "Allah instructs you concerning your children: for the male, what is equal to the share of two females." Thus, the inheritance is divided into four shares: two shares for the son, and one share for each daughter. The two granddaughters and their mother, who passed away before the grandmother, are not among the heirs. It is advisable to refer inheritance cases to Sharia courts to investigate them and ensure all rights, debts, and bequests are duly settled.