Alright, let's work through 1596 times 2001 step by step
1596 × 2001 = 2001 × (1596)
+ 2001 × 6 giving us 12006
+ 2001 × 90 producing 180090
+ 2001 × 500 yielding 1000500
+ 2001 × 1000 that is equal 2001000

= 3193596
