Alright, let's work through 1992 times 3321 step by step
1992 × 3321 = 3321 × (1992)
+ 3321 × 2 that is equal 6642
+ 3321 × 90 that is equal 298890
+ 3321 × 900 producing 2988900
+ 3321 × 1000 producing 3321000

= 6615432
