Alright, let's work through 7880 times 5057 step by step
7880 × 5057 = 5057 × (7880)
+ 5057 × 0 that equals 0
+ 5057 × 80 yielding 404560
+ 5057 × 800 that equals 4045600
+ 5057 × 7000 which equals 35399000

= 39849160
