Alright, let's work through 4779 times 1091 step by step
4779 × 1091 = 1091 × (4779)
+ 1091 × 9 what gives us 9819
+ 1091 × 70 what gives us 76370
+ 1091 × 700 which equals 763700
+ 1091 × 4000 resulting in 4364000

= 5213889
