No problem, we've got 2099 and 8639 to multiply
2099 × 8639 = 8639 × (2099)
+ 8639 × 9 giving us 77751
+ 8639 × 90 producing 777510
+ 8639 × 000 that is equal 0
+ 8639 × 2000 resulting in 17278000

= 18133261
