Alright, let's work through 8345 times 6390 step by step
8345 × 6390 = 6390 × (8345)
+ 6390 × 5 yielding 31950
+ 6390 × 40 that results in 255600
+ 6390 × 300 that results in 1917000
+ 6390 × 8000 producing 51120000

= 53324550
