No problem, we've got 1821 and 9917 to multiply
1821 × 9917 = 9917 × (1821)
+ 9917 × 1 that equals 9917
+ 9917 × 20 that results in 198340
+ 9917 × 800 that equals 7933600
+ 9917 × 1000 producing 9917000

= 18058857
