My grandfather (father's father) has 5 acre land in bihar district. He died in 1994. My grand mother

My grandfather (father's father) has 5 acre land in bihar district. He died in 1994. My grand mother died in 1999. Recently the property has been transferred in the name of his 6 siblings of which one is my father who have expired in 2002. So the name of my mother and her 3 siblings has been entered in paani. What is the Further procedure to divide the property equally with mutual understanding.