Alright, let's work through 2563 times 1239 step by step
2563 × 1239 = 1239 × (2563)
+ 1239 × 3 which equals 3717
+ 1239 × 60 producing 74340
+ 1239 × 500 producing 619500
+ 1239 × 2000 giving us 2478000

= 3175557
