Alright, let's work through 67378307 times 57258978 step by step
67378307 × 57258978 = 57258978 × (67378307)
+ 57258978 × 7 that equals 400812846
+ 57258978 × 00 producing 0
+ 57258978 × 300 yielding 17177693400
+ 57258978 × 8000 giving us 458071824000
+ 57258978 × 70000 that is equal 4008128460000
+ 57258978 × 300000 which equals 17177693400000
+ 57258978 × 7000000 what gives us 400812846000000
+ 57258978 × 60000000 which equals 3435538680000000

= 3858012998190246
