Alright, let's work through 80409940 times 74934831 step by step
80409940 × 74934831 = 74934831 × (80409940)
+ 74934831 × 0 that equals 0
+ 74934831 × 40 resulting in 2997393240
+ 74934831 × 900 that equals 67441347900
+ 74934831 × 9000 which equals 674413479000
+ 74934831 × 00000 what gives us 0
+ 74934831 × 400000 giving us 29973932400000
+ 74934831 × 0000000 resulting in 0
+ 74934831 × 80000000 producing 5994786480000000

= 6025505264620140
