Alright, let's work through 3409 times 3920 step by step
3409 × 3920 = 3920 × (3409)
+ 3920 × 9 producing 35280
+ 3920 × 00 which equals 0
+ 3920 × 400 that results in 1568000
+ 3920 × 3000 that results in 11760000

= 13363280
