Alright, let's work through 4090 times 3109 step by step
4090 × 3109 = 3109 × (4090)
+ 3109 × 0 producing 0
+ 3109 × 90 which equals 279810
+ 3109 × 000 what gives us 0
+ 3109 × 4000 that results in 12436000

= 12715810
