Alright, let's work through 83178879 times 73775353 step by step
83178879 × 73775353 = 73775353 × (83178879)
+ 73775353 × 9 giving us 663978177
+ 73775353 × 70 which equals 5164274710
+ 73775353 × 800 that results in 59020282400
+ 73775353 × 8000 that results in 590202824000
+ 73775353 × 70000 that results in 5164274710000
+ 73775353 × 100000 producing 7377535300000
+ 73775353 × 3000000 what gives us 221326059000000
+ 73775353 × 80000000 which equals 5902028240000000

= 6136551160369287
