Alright, let's work through 6400 times 765 step by step
6400 × 765 = 765 × (6400)
+ 765 × 0 giving us 0
+ 765 × 00 yielding 0
+ 765 × 400 resulting in 306000
+ 765 × 6000 which equals 4590000

= 4896000
