Alright, let's work through 3831 times 8107 step by step
3831 × 8107 = 8107 × (3831)
+ 8107 × 1 producing 8107
+ 8107 × 30 that is equal 243210
+ 8107 × 800 what gives us 6485600
+ 8107 × 3000 that is equal 24321000

= 31057917
