Simplify the following text for a Grade 7 native English-speaking person.
Original: They split up on 27 September 2001 , after selling almost 15 million records , and having 11 top ten singles and four top ten albums in the UK .
Simplified: They broke up on September 27 , 2001 , after selling almost 20 million records , and having 11 top ten singles and 4 top ten albums in the UK .