Alright, let's work through 80118940 times 79968736 step by step
80118940 × 79968736 = 79968736 × (80118940)
+ 79968736 × 0 that equals 0
+ 79968736 × 40 that results in 3198749440
+ 79968736 × 900 which equals 71971862400
+ 79968736 × 8000 that results in 639749888000
+ 79968736 × 10000 yielding 799687360000
+ 79968736 × 100000 producing 7996873600000
+ 79968736 × 0000000 that results in 0
+ 79968736 × 80000000 producing 6397498880000000

= 6407010361459840
