Alright, let's work through 6543 times 2574 step by step
6543 × 2574 = 2574 × (6543)
+ 2574 × 3 that is equal 7722
+ 2574 × 40 producing 102960
+ 2574 × 500 what gives us 1287000
+ 2574 × 6000 that results in 15444000

= 16841682
