No problem, we've got 3415 and 3939 to multiply
3415 × 3939 = 3939 × (3415)
+ 3939 × 5 that is equal 19695
+ 3939 × 10 what gives us 39390
+ 3939 × 400 giving us 1575600
+ 3939 × 3000 resulting in 11817000

= 13451685
