We're going to solve 1991 multiplied by 5406
1991 × 5406 = 5406 × (1991)
+ 5406 × 1 yielding 5406
+ 5406 × 90 producing 486540
+ 5406 × 900 which equals 4865400
+ 5406 × 1000 producing 5406000

= 10763346
