Alright, let's work through 81608035 times 79829018 step by step
81608035 × 79829018 = 79829018 × (81608035)
+ 79829018 × 5 yielding 399145090
+ 79829018 × 30 yielding 2394870540
+ 79829018 × 000 that results in 0
+ 79829018 × 8000 which equals 638632144000
+ 79829018 × 00000 producing 0
+ 79829018 × 600000 which equals 47897410800000
+ 79829018 × 1000000 resulting in 79829018000000
+ 79829018 × 80000000 resulting in 6386321440000000

= 6514689294959630
