Alright, let's work through 1585 times 1600 step by step
1585 × 1600 = 1600 × (1585)
+ 1600 × 5 giving us 8000
+ 1600 × 80 what gives us 128000
+ 1600 × 500 yielding 800000
+ 1600 × 1000 producing 1600000

= 2536000
