Alright, let's work through 83997588 times 79582878 step by step
83997588 × 79582878 = 79582878 × (83997588)
+ 79582878 × 8 that results in 636663024
+ 79582878 × 80 giving us 6366630240
+ 79582878 × 500 what gives us 39791439000
+ 79582878 × 7000 producing 557080146000
+ 79582878 × 90000 resulting in 7162459020000
+ 79582878 × 900000 which equals 71624590200000
+ 79582878 × 3000000 yielding 238748634000000
+ 79582878 × 80000000 producing 6366630240000000

= 6684769798098264
