Alright, let's work through 2592 times 6421 step by step
2592 × 6421 = 6421 × (2592)
+ 6421 × 2 producing 12842
+ 6421 × 90 giving us 577890
+ 6421 × 500 what gives us 3210500
+ 6421 × 2000 what gives us 12842000

= 16643232
