No problem, we've got 1999 and 8180 to multiply
1999 × 8180 = 8180 × (1999)
+ 8180 × 9 giving us 73620
+ 8180 × 90 producing 736200
+ 8180 × 900 that is equal 7362000
+ 8180 × 1000 that is equal 8180000

= 16351820
