Alright, let's work through 2039 times 6237 step by step
2039 × 6237 = 6237 × (2039)
+ 6237 × 9 producing 56133
+ 6237 × 30 giving us 187110
+ 6237 × 000 giving us 0
+ 6237 × 2000 yielding 12474000

= 12717243
