Alright, let's work through 77489444 times 84251823 step by step
77489444 × 84251823 = 84251823 × (77489444)
+ 84251823 × 4 that results in 337007292
+ 84251823 × 40 producing 3370072920
+ 84251823 × 400 giving us 33700729200
+ 84251823 × 9000 giving us 758266407000
+ 84251823 × 80000 what gives us 6740145840000
+ 84251823 × 400000 yielding 33700729200000
+ 84251823 × 7000000 which equals 589762761000000
+ 84251823 × 70000000 producing 5897627610000000

= 6528626920256412
