Alright, let's work through 6135 times 2007 step by step
6135 × 2007 = 2007 × (6135)
+ 2007 × 5 producing 10035
+ 2007 × 30 which equals 60210
+ 2007 × 100 that is equal 200700
+ 2007 × 6000 that equals 12042000

= 12312945
