Alright, let's work through 3887 times 1131 step by step
3887 × 1131 = 1131 × (3887)
+ 1131 × 7 which equals 7917
+ 1131 × 80 that equals 90480
+ 1131 × 800 that is equal 904800
+ 1131 × 3000 resulting in 3393000

= 4396197
