Alright, let's work through 7920 times 2627 step by step
7920 × 2627 = 2627 × (7920)
+ 2627 × 0 resulting in 0
+ 2627 × 20 producing 52540
+ 2627 × 900 that results in 2364300
+ 2627 × 7000 which equals 18389000

= 20805840
