Alright, let's work through 80831078 times 45881599 step by step
80831078 × 45881599 = 45881599 × (80831078)
+ 45881599 × 8 which equals 367052792
+ 45881599 × 70 that is equal 3211711930
+ 45881599 × 000 resulting in 0
+ 45881599 × 1000 giving us 45881599000
+ 45881599 × 30000 which equals 1376447970000
+ 45881599 × 800000 that results in 36705279200000
+ 45881599 × 0000000 which equals 0
+ 45881599 × 80000000 that is equal 3670527920000000

= 3708659107533722
