Alright, let's work through 9399 times 428 step by step
9399 × 428 = 428 × (9399)
+ 428 × 9 that equals 3852
+ 428 × 90 producing 38520
+ 428 × 300 which equals 128400
+ 428 × 9000 resulting in 3852000

= 4022772
