Alright, let's work through 7765 times 3991 step by step
7765 × 3991 = 3991 × (7765)
+ 3991 × 5 which equals 19955
+ 3991 × 60 which equals 239460
+ 3991 × 700 giving us 2793700
+ 3991 × 7000 that is equal 27937000

= 30990115
