Alright, let's work through 3903 times 3821 step by step
3903 × 3821 = 3821 × (3903)
+ 3821 × 3 that is equal 11463
+ 3821 × 00 that results in 0
+ 3821 × 900 that is equal 3438900
+ 3821 × 3000 that equals 11463000

= 14913363
