Alright, let's work through 2587 times 1003 step by step
2587 × 1003 = 1003 × (2587)
+ 1003 × 7 which equals 7021
+ 1003 × 80 yielding 80240
+ 1003 × 500 resulting in 501500
+ 1003 × 2000 what gives us 2006000

= 2594761
