Alright, let's work through 84432989 times 45453199 step by step
84432989 × 45453199 = 45453199 × (84432989)
+ 45453199 × 9 yielding 409078791
+ 45453199 × 80 resulting in 3636255920
+ 45453199 × 900 giving us 40907879100
+ 45453199 × 2000 what gives us 90906398000
+ 45453199 × 30000 giving us 1363595970000
+ 45453199 × 400000 resulting in 18181279600000
+ 45453199 × 4000000 producing 181812796000000
+ 45453199 × 80000000 producing 3636255920000000

= 3837749451181811
