Simplify the following text for a Grade 14 native English-speaking person.
Original: Duke Ernest of Gotha and Duchess Elisabeth Sophie 's numerous sons divided the inheritance ( five eights of all Ernestine lands ) initially to seven parts : Gotha-Altenburg , Coburg , Meiningen , RÃ mhild , Eisenberg , Hildburghausen and Saalfeld .
Simplified: Duke Ernest of Gotha and Duchess Elisabeth Sophie 's numerous sons divided the inheritance into seven parts : Gotha-Altenburg , Coburg , Meiningen , RÃ mhild , Eisenberg , Hildburghausen and Saalfeld .