Alright, let's work through 4290 times 3686 step by step
4290 × 3686 = 3686 × (4290)
+ 3686 × 0 yielding 0
+ 3686 × 90 what gives us 331740
+ 3686 × 200 giving us 737200
+ 3686 × 4000 resulting in 14744000

= 15812940
