Alright, let's work through 4080 times 3124 step by step
4080 × 3124 = 3124 × (4080)
+ 3124 × 0 which equals 0
+ 3124 × 80 producing 249920
+ 3124 × 000 that equals 0
+ 3124 × 4000 that equals 12496000

= 12745920
