Alright, let's work through 3955 times 1091 step by step
3955 × 1091 = 1091 × (3955)
+ 1091 × 5 that equals 5455
+ 1091 × 50 that results in 54550
+ 1091 × 900 that equals 981900
+ 1091 × 3000 which equals 3273000

= 4314905
