Alright, let's work through 3686 times 3551 step by step
3686 × 3551 = 3551 × (3686)
+ 3551 × 6 what gives us 21306
+ 3551 × 80 that is equal 284080
+ 3551 × 600 which equals 2130600
+ 3551 × 3000 which equals 10653000

= 13088986
