Alright, let's work through 2004 times 4143 step by step
2004 × 4143 = 4143 × (2004)
+ 4143 × 4 which equals 16572
+ 4143 × 00 that equals 0
+ 4143 × 000 yielding 0
+ 4143 × 2000 that equals 8286000

= 8302572
