Alright, let's work through 9992 times 7642 step by step
9992 × 7642 = 7642 × (9992)
+ 7642 × 2 that is equal 15284
+ 7642 × 90 that equals 687780
+ 7642 × 900 giving us 6877800
+ 7642 × 9000 producing 68778000

= 76358864
