Alright, let's work through 6880 times 3387 step by step
6880 × 3387 = 3387 × (6880)
+ 3387 × 0 that is equal 0
+ 3387 × 80 what gives us 270960
+ 3387 × 800 yielding 2709600
+ 3387 × 6000 that is equal 20322000

= 23302560
