Alright, let's work through 82113989 times 78671967 step by step
82113989 × 78671967 = 78671967 × (82113989)
+ 78671967 × 9 giving us 708047703
+ 78671967 × 80 that results in 6293757360
+ 78671967 × 900 producing 70804770300
+ 78671967 × 3000 that results in 236015901000
+ 78671967 × 10000 giving us 786719670000
+ 78671967 × 100000 producing 7867196700000
+ 78671967 × 2000000 producing 157343934000000
+ 78671967 × 80000000 resulting in 6293757360000000

= 6460069032846363
