Alright, let's work through 3966 times 3881 step by step
3966 × 3881 = 3881 × (3966)
+ 3881 × 6 what gives us 23286
+ 3881 × 60 which equals 232860
+ 3881 × 900 yielding 3492900
+ 3881 × 3000 yielding 11643000

= 15392046
