No problem, we've got 6423 and 2847 to multiply
6423 × 2847 = 2847 × (6423)
+ 2847 × 3 yielding 8541
+ 2847 × 20 that is equal 56940
+ 2847 × 400 that is equal 1138800
+ 2847 × 6000 producing 17082000

= 18286281
