Alright, let's work through 84103997 times 97299051 step by step
84103997 × 97299051 = 97299051 × (84103997)
+ 97299051 × 7 that equals 681093357
+ 97299051 × 90 that is equal 8756914590
+ 97299051 × 900 resulting in 87569145900
+ 97299051 × 3000 yielding 291897153000
+ 97299051 × 00000 resulting in 0
+ 97299051 × 100000 that is equal 9729905100000
+ 97299051 × 4000000 producing 389196204000000
+ 97299051 × 80000000 producing 7783924080000000

= 8183239093406847
