Alright, let's work through 9911 times 408 step by step
9911 × 408 = 408 × (9911)
+ 408 × 1 producing 408
+ 408 × 10 that equals 4080
+ 408 × 900 resulting in 367200
+ 408 × 9000 that is equal 3672000

= 4043688
