Alright, let's work through 1039 times 6121 step by step
1039 × 6121 = 6121 × (1039)
+ 6121 × 9 which equals 55089
+ 6121 × 30 resulting in 183630
+ 6121 × 000 producing 0
+ 6121 × 1000 yielding 6121000

= 6359719
