Alright, let's work through 2621 times 7720 step by step
2621 × 7720 = 7720 × (2621)
+ 7720 × 1 producing 7720
+ 7720 × 20 producing 154400
+ 7720 × 600 that equals 4632000
+ 7720 × 2000 resulting in 15440000

= 20234120
