Alright, let's work through 4000 times 2502 step by step
4000 × 2502 = 2502 × (4000)
+ 2502 × 0 producing 0
+ 2502 × 00 what gives us 0
+ 2502 × 000 what gives us 0
+ 2502 × 4000 that results in 10008000

= 10008000
