Alright, let's work through 3897 times 3903 step by step
3897 × 3903 = 3903 × (3897)
+ 3903 × 7 that equals 27321
+ 3903 × 90 producing 351270
+ 3903 × 800 yielding 3122400
+ 3903 × 3000 which equals 11709000

= 15209991
