Alright, let's work through 2621 times 6503 step by step
2621 × 6503 = 6503 × (2621)
+ 6503 × 1 which equals 6503
+ 6503 × 20 resulting in 130060
+ 6503 × 600 giving us 3901800
+ 6503 × 2000 what gives us 13006000

= 17044363
