Alright, let's work through 3903 times 5563 step by step
3903 × 5563 = 5563 × (3903)
+ 5563 × 3 giving us 16689
+ 5563 × 00 that results in 0
+ 5563 × 900 yielding 5006700
+ 5563 × 3000 resulting in 16689000

= 21712389
