Alright, let's work through 1931 times 4081 step by step
1931 × 4081 = 4081 × (1931)
+ 4081 × 1 producing 4081
+ 4081 × 30 that equals 122430
+ 4081 × 900 that results in 3672900
+ 4081 × 1000 that results in 4081000

= 7880411
