Alright, let's work through 81983369 times 17421708 step by step
81983369 × 17421708 = 17421708 × (81983369)
+ 17421708 × 9 that results in 156795372
+ 17421708 × 60 giving us 1045302480
+ 17421708 × 300 resulting in 5226512400
+ 17421708 × 3000 resulting in 52265124000
+ 17421708 × 80000 what gives us 1393736640000
+ 17421708 × 900000 which equals 15679537200000
+ 17421708 × 1000000 resulting in 17421708000000
+ 17421708 × 80000000 that is equal 1393736640000000

= 1428290315574252
