Alright, let's work through 5403 times 2504 step by step
5403 × 2504 = 2504 × (5403)
+ 2504 × 3 what gives us 7512
+ 2504 × 00 which equals 0
+ 2504 × 400 which equals 1001600
+ 2504 × 5000 yielding 12520000

= 13529112
