Alright, let's work through 9857 times 4055 step by step
9857 × 4055 = 4055 × (9857)
+ 4055 × 7 resulting in 28385
+ 4055 × 50 that equals 202750
+ 4055 × 800 producing 3244000
+ 4055 × 9000 yielding 36495000

= 39970135
