Alright, let's work through 5457 times 3457 step by step
5457 × 3457 = 3457 × (5457)
+ 3457 × 7 what gives us 24199
+ 3457 × 50 which equals 172850
+ 3457 × 400 resulting in 1382800
+ 3457 × 5000 producing 17285000

= 18864849
