Alright, let's work through 2621 times 8364 step by step
2621 × 8364 = 8364 × (2621)
+ 8364 × 1 producing 8364
+ 8364 × 20 yielding 167280
+ 8364 × 600 which equals 5018400
+ 8364 × 2000 which equals 16728000

= 21922044
