Alright, let's work through 78969319 times 39519642 step by step
78969319 × 39519642 = 39519642 × (78969319)
+ 39519642 × 9 resulting in 355676778
+ 39519642 × 10 that equals 395196420
+ 39519642 × 300 yielding 11855892600
+ 39519642 × 9000 producing 355676778000
+ 39519642 × 60000 giving us 2371178520000
+ 39519642 × 900000 that is equal 35567677800000
+ 39519642 × 8000000 that is equal 316157136000000
+ 39519642 × 70000000 which equals 2766374940000000

= 3120839215863798
