Alright, let's work through 7877 times 7997 step by step
7877 × 7997 = 7997 × (7877)
+ 7997 × 7 that is equal 55979
+ 7997 × 70 resulting in 559790
+ 7997 × 800 resulting in 6397600
+ 7997 × 7000 which equals 55979000

= 62992369
