Alright, let's work through 2009 times 2145 step by step
2009 × 2145 = 2145 × (2009)
+ 2145 × 9 that equals 19305
+ 2145 × 00 yielding 0
+ 2145 × 000 resulting in 0
+ 2145 × 2000 that results in 4290000

= 4309305
