Alright, let's work through 80131144 times 79970980 step by step
80131144 × 79970980 = 79970980 × (80131144)
+ 79970980 × 4 that results in 319883920
+ 79970980 × 40 that equals 3198839200
+ 79970980 × 100 giving us 7997098000
+ 79970980 × 1000 that is equal 79970980000
+ 79970980 × 30000 that results in 2399129400000
+ 79970980 × 100000 yielding 7997098000000
+ 79970980 × 0000000 giving us 0
+ 79970980 × 80000000 that equals 6397678400000000

= 6408166114201120
