Alright, let's work through 3984 times 3938 step by step
3984 × 3938 = 3938 × (3984)
+ 3938 × 4 producing 15752
+ 3938 × 80 that is equal 315040
+ 3938 × 900 which equals 3544200
+ 3938 × 3000 what gives us 11814000

= 15688992
