Let's calculate 13835809 x 80429021
13835809 × 80429021 = 80429021 × (13835809)
+ 80429021 × 9 that is equal 723861189
+ 80429021 × 00 producing 0
+ 80429021 × 800 resulting in 64343216800
+ 80429021 × 5000 resulting in 402145105000
+ 80429021 × 30000 yielding 2412870630000
+ 80429021 × 800000 what gives us 64343216800000
+ 80429021 × 3000000 that results in 241287063000000
+ 80429021 × 10000000 that results in 804290210000000

= 1112800572612989
