Alright, let's work through 3504 times 3899 step by step
3504 × 3899 = 3899 × (3504)
+ 3899 × 4 yielding 15596
+ 3899 × 00 producing 0
+ 3899 × 500 that is equal 1949500
+ 3899 × 3000 which equals 11697000

= 13662096
