Alright, let's work through 8039 times 129 step by step
8039 × 129 = 129 × (8039)
+ 129 × 9 giving us 1161
+ 129 × 30 that is equal 3870
+ 129 × 000 that equals 0
+ 129 × 8000 yielding 1032000

= 1037031
