No problem, we've got 3581 and 6122 to multiply
3581 × 6122 = 6122 × (3581)
+ 6122 × 1 what gives us 6122
+ 6122 × 80 that is equal 489760
+ 6122 × 500 resulting in 3061000
+ 6122 × 3000 that equals 18366000

= 21922882
