Alright, let's work through 3840 times 835 step by step
3840 × 835 = 835 × (3840)
+ 835 × 0 resulting in 0
+ 835 × 40 that results in 33400
+ 835 × 800 that is equal 668000
+ 835 × 3000 yielding 2505000

= 3206400
