No problem, we've got 6423 and 2544 to multiply
6423 × 2544 = 2544 × (6423)
+ 2544 × 3 resulting in 7632
+ 2544 × 20 that results in 50880
+ 2544 × 400 which equals 1017600
+ 2544 × 6000 that results in 15264000

= 16340112
