Alright, let's work through 7789 times 3977 step by step
7789 × 3977 = 3977 × (7789)
+ 3977 × 9 that results in 35793
+ 3977 × 80 that equals 318160
+ 3977 × 700 yielding 2783900
+ 3977 × 7000 resulting in 27839000

= 30976853
