Alright, let's work through 1621 times 9416 step by step
1621 × 9416 = 9416 × (1621)
+ 9416 × 1 yielding 9416
+ 9416 × 20 which equals 188320
+ 9416 × 600 yielding 5649600
+ 9416 × 1000 that equals 9416000

= 15263336
