Alright, let's work through 8541 times 8400 step by step
8541 × 8400 = 8400 × (8541)
+ 8400 × 1 that is equal 8400
+ 8400 × 40 what gives us 336000
+ 8400 × 500 what gives us 4200000
+ 8400 × 8000 producing 67200000

= 71744400
