The game, which took place on the field of the "Vicarage Road" stadium, ended with a score of 5: 0 in favor of the Merseyside team.
Roberto Firmino scored a hat-trick for Liverpool (37th, 52nd, 91st minutes).
The goals were also scored by Sadio Mane (9th minute), Mohammed Salah (54th).
Liverpool (18 points) came out on top in the Premier League standings, displacing Chelsea (16).
The London club will play on the road against Brentford on October 16 in the eighth round.
Earlier, the head coach of London Arsenal Mikel Arteta said that he dreams of leading the club to victory in the English Premier League (Premier League).