Sounds simple enough to me.
Just divide it up equally. If necessary liquidate everything first.
Not so easy with someone like Prince. There are going to be record royalties coming in for years on existing recordings. There are unreleased recordings in the vaults, and someone has to decide if they should be released, and if so, when and in what format.
Jimi Hendrix's estate was a mess for years, if not decades, before all the financial and artistic disputes were ironed out.