Alright, let's work through 83419836 times 64702824 step by step
83419836 × 64702824 = 64702824 × (83419836)
+ 64702824 × 6 giving us 388216944
+ 64702824 × 30 which equals 1941084720
+ 64702824 × 800 resulting in 51762259200
+ 64702824 × 9000 yielding 582325416000
+ 64702824 × 10000 that results in 647028240000
+ 64702824 × 400000 yielding 25881129600000
+ 64702824 × 3000000 giving us 194108472000000
+ 64702824 × 80000000 producing 5176225920000000

= 5397498966816864
