Alright, let's work through 2006 times 6240 step by step
2006 × 6240 = 6240 × (2006)
+ 6240 × 6 that is equal 37440
+ 6240 × 00 yielding 0
+ 6240 × 000 that is equal 0
+ 6240 × 2000 yielding 12480000

= 12517440
