Answer:
(Fatwa: 416/209/D=1432)
If no one from the parents of your grandfather and grandmother was alive at the time of their death, their inheritance shall be divided into 2 shares and both their sons shall get 1-1 share.
Detail:
Son: 2×1 02
Total: 2 Shares
Allah (Subhana Wa Ta’ala) knows Best
Darul Ifta,
Darul Uloom Deoband
