Alright, let's work through 5255 times 2405 step by step
5255 × 2405 = 2405 × (5255)
+ 2405 × 5 resulting in 12025
+ 2405 × 50 producing 120250
+ 2405 × 200 giving us 481000
+ 2405 × 5000 producing 12025000

= 12638275
