Alright, let's work through 3400 times 647 step by step
3400 × 647 = 647 × (3400)
+ 647 × 0 producing 0
+ 647 × 00 resulting in 0
+ 647 × 400 what gives us 258800
+ 647 × 3000 which equals 1941000

= 2199800
