Alright, let's work through 8523 times 2009 step by step
8523 × 2009 = 2009 × (8523)
+ 2009 × 3 that equals 6027
+ 2009 × 20 which equals 40180
+ 2009 × 500 giving us 1004500
+ 2009 × 8000 that results in 16072000

= 17122707
