Alright, let's work through 3420 times 5646 step by step
3420 × 5646 = 5646 × (3420)
+ 5646 × 0 yielding 0
+ 5646 × 20 yielding 112920
+ 5646 × 400 giving us 2258400
+ 5646 × 3000 that results in 16938000

= 19309320
