Alright, let's work through 7994 times 7993 step by step
7994 × 7993 = 7993 × (7994)
+ 7993 × 4 which equals 31972
+ 7993 × 90 producing 719370
+ 7993 × 900 producing 7193700
+ 7993 × 7000 which equals 55951000

= 63896042
