No problem, we've got 3521 and 5660 to multiply
3521 × 5660 = 5660 × (3521)
+ 5660 × 1 yielding 5660
+ 5660 × 20 producing 113200
+ 5660 × 500 that is equal 2830000
+ 5660 × 3000 yielding 16980000

= 19928860
