Alright, let's work through 3686 times 2581 step by step
3686 × 2581 = 2581 × (3686)
+ 2581 × 6 what gives us 15486
+ 2581 × 80 that equals 206480
+ 2581 × 600 which equals 1548600
+ 2581 × 3000 that results in 7743000

= 9513566
