No problem, we've got 6687 and 3189 to multiply
6687 × 3189 = 3189 × (6687)
+ 3189 × 7 that is equal 22323
+ 3189 × 80 yielding 255120
+ 3189 × 600 which equals 1913400
+ 3189 × 6000 resulting in 19134000

= 21324843
