How much does each heir inherit from the deceased's estate if he left behind: 3 sons, 4 daughters, and 1 wife?

If the heirs are limited to the wife, sons, and daughters, and the deceased left no other heir such as a father or mother, then the wife receives one-eighth (1/8) as a fixed share due to the presence of a lineal descendant, based on Allah's saying: "But if you have a child, then for them [the wives] is one eighth of what you leave." The remainder goes to the sons and daughters by way of ta’sib (residuary heirship), with the male receiving the share of two females, based on Allah's saying: "Allah instructs you concerning your children: for the male, what is equal to the share of two females." It must be emphasized that inheritance matters are serious and should not be settled merely by a fatwa. Rather, they must be presented to Sharia courts for investigation and to ensure there are no wills, debts, or other rights that take precedence over the heirs' rights.