Alright, let's work through 3438 times 3997 step by step
3438 × 3997 = 3997 × (3438)
+ 3997 × 8 that equals 31976
+ 3997 × 30 yielding 119910
+ 3997 × 400 giving us 1598800
+ 3997 × 3000 giving us 11991000

= 13741686
