No problem, we've got 1890 and 6441 to multiply
1890 × 6441 = 6441 × (1890)
+ 6441 × 0 that equals 0
+ 6441 × 90 producing 579690
+ 6441 × 800 producing 5152800
+ 6441 × 1000 that equals 6441000

= 12173490
