Alright, let's work through 6392697 times 42451398 step by step
6392697 × 42451398 = 42451398 × (6392697)
+ 42451398 × 7 that is equal 297159786
+ 42451398 × 90 resulting in 3820625820
+ 42451398 × 600 what gives us 25470838800
+ 42451398 × 2000 resulting in 84902796000
+ 42451398 × 90000 what gives us 3820625820000
+ 42451398 × 300000 producing 12735419400000
+ 42451398 × 6000000 yielding 254708388000000

= 271378924640406
