Alright, let's work through 7883 times 503 step by step
7883 × 503 = 503 × (7883)
+ 503 × 3 resulting in 1509
+ 503 × 80 that is equal 40240
+ 503 × 800 yielding 402400
+ 503 × 7000 resulting in 3521000

= 3965149
