Alright, let's work through 1990 times 7691 step by step
1990 × 7691 = 7691 × (1990)
+ 7691 × 0 which equals 0
+ 7691 × 90 resulting in 692190
+ 7691 × 900 which equals 6921900
+ 7691 × 1000 producing 7691000

= 15305090
