Alright, let's work through 20028083 times 36420855 step by step
20028083 × 36420855 = 36420855 × (20028083)
+ 36420855 × 3 giving us 109262565
+ 36420855 × 80 which equals 2913668400
+ 36420855 × 000 yielding 0
+ 36420855 × 8000 yielding 291366840000
+ 36420855 × 20000 that is equal 728417100000
+ 36420855 × 000000 which equals 0
+ 36420855 × 0000000 producing 0
+ 36420855 × 20000000 resulting in 728417100000000

= 729439906870965
