Alright, let's work through 7877 times 3151 step by step
7877 × 3151 = 3151 × (7877)
+ 3151 × 7 giving us 22057
+ 3151 × 70 resulting in 220570
+ 3151 × 800 resulting in 2520800
+ 3151 × 7000 what gives us 22057000

= 24820427
