Alright, let's work through 8454 times 5140 step by step
8454 × 5140 = 5140 × (8454)
+ 5140 × 4 yielding 20560
+ 5140 × 50 which equals 257000
+ 5140 × 400 what gives us 2056000
+ 5140 × 8000 that equals 41120000

= 43453560
