Alright, let's work through 4357 times 4885 step by step
4357 × 4885 = 4885 × (4357)
+ 4885 × 7 producing 34195
+ 4885 × 50 that results in 244250
+ 4885 × 300 which equals 1465500
+ 4885 × 4000 resulting in 19540000

= 21283945
