Alright, let's work through 6391 times 5320 step by step
6391 × 5320 = 5320 × (6391)
+ 5320 × 1 that equals 5320
+ 5320 × 90 producing 478800
+ 5320 × 300 what gives us 1596000
+ 5320 × 6000 producing 31920000

= 34000120
