Alright, let's work through 6279 times 6643 step by step
6279 × 6643 = 6643 × (6279)
+ 6643 × 9 that results in 59787
+ 6643 × 70 that is equal 465010
+ 6643 × 200 that is equal 1328600
+ 6643 × 6000 producing 39858000

= 41711397
