No problem, we've got 6343 and 2544 to multiply
6343 × 2544 = 2544 × (6343)
+ 2544 × 3 which equals 7632
+ 2544 × 40 that results in 101760
+ 2544 × 300 what gives us 763200
+ 2544 × 6000 resulting in 15264000

= 16136592
