Alright, let's work through 3831 times 1058 step by step
3831 × 1058 = 1058 × (3831)
+ 1058 × 1 giving us 1058
+ 1058 × 30 that results in 31740
+ 1058 × 800 giving us 846400
+ 1058 × 3000 producing 3174000

= 4053198
