Alright, let's work through 3903 times 5492 step by step
3903 × 5492 = 5492 × (3903)
+ 5492 × 3 resulting in 16476
+ 5492 × 00 what gives us 0
+ 5492 × 900 which equals 4942800
+ 5492 × 3000 which equals 16476000

= 21435276
