No problem, we've got 3119 and 6321 to multiply
3119 × 6321 = 6321 × (3119)
+ 6321 × 9 giving us 56889
+ 6321 × 10 yielding 63210
+ 6321 × 100 giving us 632100
+ 6321 × 3000 giving us 18963000

= 19715199
