Alright, let's work through 1120 times 3541 step by step
1120 × 3541 = 3541 × (1120)
+ 3541 × 0 that results in 0
+ 3541 × 20 what gives us 70820
+ 3541 × 100 giving us 354100
+ 3541 × 1000 resulting in 3541000

= 3965920
