Alright, let's work through 2005 times 3873 step by step
2005 × 3873 = 3873 × (2005)
+ 3873 × 5 that is equal 19365
+ 3873 × 00 what gives us 0
+ 3873 × 000 that is equal 0
+ 3873 × 2000 giving us 7746000

= 7765365
