Alright, let's work through 3805 times 4287 step by step
3805 × 4287 = 4287 × (3805)
+ 4287 × 5 what gives us 21435
+ 4287 × 00 what gives us 0
+ 4287 × 800 giving us 3429600
+ 4287 × 3000 that is equal 12861000

= 16312035
