Alright, let's work through 4257 times 4723 step by step
4257 × 4723 = 4723 × (4257)
+ 4723 × 7 giving us 33061
+ 4723 × 50 what gives us 236150
+ 4723 × 200 what gives us 944600
+ 4723 × 4000 yielding 18892000

= 20105811
