Alright, let's work through 3997 times 5994 step by step
3997 × 5994 = 5994 × (3997)
+ 5994 × 7 giving us 41958
+ 5994 × 90 that is equal 539460
+ 5994 × 900 producing 5394600
+ 5994 × 3000 that is equal 17982000

= 23958018
