Alright, let's work through 4780 times 8191 step by step
4780 × 8191 = 8191 × (4780)
+ 8191 × 0 giving us 0
+ 8191 × 80 what gives us 655280
+ 8191 × 700 that is equal 5733700
+ 8191 × 4000 that results in 32764000

= 39152980
