She died and left behind four sons, a daughter, a brother and grandchildren
Question

                My grandma has just passed away (To Him we shall return) and i was wondering how to divide the property.

She has No parents. She has One brother. She has 4 sons and daughters [and many grandchildren. I was wondering how she would divide the will, it is an urgent situation since it might be divided in a way that is opposing to Islam.
Praise be to Allah.
      If a woman dies and leaves behind four sons, a daughter, a 
      brother and grandchildren, and her sons and daughter were alive at the 
      time of her death, then her estate is to be divided between the sons and 
      the daughter, with each male getting the share of two females, because 
      Allah, may He be exalted, says (interpretation of the meaning):

    “Allaah commands you as regards your children’s 
    (inheritance): to the male, a portion equal to that of two females”

    [al-Nisa’ 4:11]. 

    There is nothing for her brother or her grandchildren, 
    because they are deprived of a share by the presence of the sons. 

    As the male gets the share of two females, the four sons get 
    the share of eight females, so the estate should be divided by nine, with 
    the daughter getting one ninth and each male getting two ninths. 

    So the daughter's share = the estate
    ÷ 9 x 1 

    The share of each son = the estate
    ÷ 9 x 2 

    And Allah knows best.