Alright, let's work through 80726664 times 20887417 step by step
80726664 × 20887417 = 20887417 × (80726664)
+ 20887417 × 4 resulting in 83549668
+ 20887417 × 60 that is equal 1253245020
+ 20887417 × 600 producing 12532450200
+ 20887417 × 6000 what gives us 125324502000
+ 20887417 × 20000 yielding 417748340000
+ 20887417 × 700000 resulting in 14621191900000
+ 20887417 × 0000000 which equals 0
+ 20887417 × 80000000 giving us 1670993360000000

= 1686171493986888
