Alright, let's work through 68780119 times 81200221 step by step
68780119 × 81200221 = 81200221 × (68780119)
+ 81200221 × 9 what gives us 730801989
+ 81200221 × 10 what gives us 812002210
+ 81200221 × 100 that results in 8120022100
+ 81200221 × 0000 resulting in 0
+ 81200221 × 80000 that results in 6496017680000
+ 81200221 × 700000 what gives us 56840154700000
+ 81200221 × 8000000 that is equal 649601768000000
+ 81200221 × 60000000 that is equal 4872013260000000

= 5584960863206299
