No problem, we've got 3920 and 3407 to multiply
3920 × 3407 = 3407 × (3920)
+ 3407 × 0 yielding 0
+ 3407 × 20 that results in 68140
+ 3407 × 900 giving us 3066300
+ 3407 × 3000 that is equal 10221000

= 13355440
