Simplify the following text for a Grade 8 native English-speaking person.
Original: Louis XVIII ( Louis Stanislas Xavier ; 17 November 1755 â `` 16 September 1824 ) was King of France and of Navarre from 1814 to 1824 , omitting the Hundred Days in 1815 .
Simplified: Louis XVIII , the desired ( 1755 - 1824 ) , king of France from April 1814 to March 1815 and again from July 1815 to September 1824 .