Alright, let's work through 3997 times 835 step by step
3997 × 835 = 835 × (3997)
+ 835 × 7 which equals 5845
+ 835 × 90 what gives us 75150
+ 835 × 900 that is equal 751500
+ 835 × 3000 yielding 2505000

= 3337495
