Alright, let's work through 3690 times 3963 step by step
3690 × 3963 = 3963 × (3690)
+ 3963 × 0 what gives us 0
+ 3963 × 90 that results in 356670
+ 3963 × 600 yielding 2377800
+ 3963 × 3000 that is equal 11889000

= 14623470
