Alright, let's work through 7877 times 9919 step by step
7877 × 9919 = 9919 × (7877)
+ 9919 × 7 producing 69433
+ 9919 × 70 producing 694330
+ 9919 × 800 that results in 7935200
+ 9919 × 7000 that results in 69433000

= 78131963
