Alright, let's work through 3523 times 3960 step by step
3523 × 3960 = 3960 × (3523)
+ 3960 × 3 yielding 11880
+ 3960 × 20 that is equal 79200
+ 3960 × 500 that is equal 1980000
+ 3960 × 3000 resulting in 11880000

= 13951080
