Let's calculate 8454 x 8456
8454 × 8456 = 8456 × (8454)
+ 8456 × 4 resulting in 33824
+ 8456 × 50 which equals 422800
+ 8456 × 400 which equals 3382400
+ 8456 × 8000 what gives us 67648000

= 71487024
