Alright, let's work through 2006 times 4307 step by step
2006 × 4307 = 4307 × (2006)
+ 4307 × 6 that is equal 25842
+ 4307 × 00 producing 0
+ 4307 × 000 producing 0
+ 4307 × 2000 producing 8614000

= 8639842
