Alright, let's work through 2505 times 6423 step by step
2505 × 6423 = 6423 × (2505)
+ 6423 × 5 producing 32115
+ 6423 × 00 resulting in 0
+ 6423 × 500 that results in 3211500
+ 6423 × 2000 that is equal 12846000

= 16089615
