Simplify the following text for a Grade 7 native English-speaking person.
Original: Millard Fillmore ( January 7 , 1800 â `` March 8 , 1874 ) was the 13th President of the United States ( 1850-1853 ) and the last member of the Whig Party to hold the office of president .
Simplified: Millard Fillmore ( January 7 , 1800 - March 8 , 1874 ) was the 13th President of the United States .