Alright, let's work through 8780 times 8867 step by step
8780 × 8867 = 8867 × (8780)
+ 8867 × 0 producing 0
+ 8867 × 80 that equals 709360
+ 8867 × 700 that equals 6206900
+ 8867 × 8000 which equals 70936000

= 77852260
