Alright, let's work through 3966 times 1312 step by step
3966 × 1312 = 1312 × (3966)
+ 1312 × 6 that results in 7872
+ 1312 × 60 which equals 78720
+ 1312 × 900 that equals 1180800
+ 1312 × 3000 giving us 3936000

= 5203392
