Alright, let's work through 8191 times 9559 step by step
8191 × 9559 = 9559 × (8191)
+ 9559 × 1 what gives us 9559
+ 9559 × 90 that equals 860310
+ 9559 × 100 yielding 955900
+ 9559 × 8000 that results in 76472000

= 78297769
