Alright, let's work through 80131784 times 64762227 step by step
80131784 × 64762227 = 64762227 × (80131784)
+ 64762227 × 4 which equals 259048908
+ 64762227 × 80 that is equal 5180978160
+ 64762227 × 700 giving us 45333558900
+ 64762227 × 1000 which equals 64762227000
+ 64762227 × 30000 that is equal 1942866810000
+ 64762227 × 100000 producing 6476222700000
+ 64762227 × 0000000 that results in 0
+ 64762227 × 80000000 that results in 5180978160000000

= 5189512785322968
