Alright, let's work through 8038 times 1605 step by step
8038 × 1605 = 1605 × (8038)
+ 1605 × 8 that is equal 12840
+ 1605 × 30 yielding 48150
+ 1605 × 000 producing 0
+ 1605 × 8000 that equals 12840000

= 12900990
