Alright, let's work through 9643 times 6390 step by step
9643 × 6390 = 6390 × (9643)
+ 6390 × 3 which equals 19170
+ 6390 × 40 giving us 255600
+ 6390 × 600 yielding 3834000
+ 6390 × 9000 which equals 57510000

= 61618770
