Alright, let's work through 8344989 times 99131678 step by step
8344989 × 99131678 = 99131678 × (8344989)
+ 99131678 × 9 resulting in 892185102
+ 99131678 × 80 producing 7930534240
+ 99131678 × 900 which equals 89218510200
+ 99131678 × 4000 that equals 396526712000
+ 99131678 × 40000 yielding 3965267120000
+ 99131678 × 300000 which equals 29739503400000
+ 99131678 × 8000000 what gives us 793053424000000

= 827252762461542
