Alright, let's work through 4254 times 5107 step by step
4254 × 5107 = 5107 × (4254)
+ 5107 × 4 resulting in 20428
+ 5107 × 50 that equals 255350
+ 5107 × 200 producing 1021400
+ 5107 × 4000 giving us 20428000

= 21725178
