What is the share in inheritance for four sons of a full brother and two full sisters?

For the two full sisters, two-thirds (as a prescribed share), based on the Almighty's saying: "But if there are two, they will have two-thirds of what he left" (An-Nisa: 176). The remainder goes to the sons of the full brother by ta'seeb (residuary inheritance). The estate is divided into twelve shares: the two sisters receive eight shares (four shares for each sister), and each son of the full brother receives one share. The matter must be referred to the Sharia courts to verify the absence of other heirs, wills, or debts.