Alright, let's work through 81799466 times 1966522 step by step
81799466 × 1966522 = 1966522 × (81799466)
+ 1966522 × 6 resulting in 11799132
+ 1966522 × 60 that is equal 117991320
+ 1966522 × 400 which equals 786608800
+ 1966522 × 9000 giving us 17698698000
+ 1966522 × 90000 which equals 176986980000
+ 1966522 × 700000 resulting in 1376565400000
+ 1966522 × 1000000 that is equal 1966522000000
+ 1966522 × 80000000 that equals 157321760000000

= 160860449477252
