No problem, we've got 3420 and 3797 to multiply
3420 × 3797 = 3797 × (3420)
+ 3797 × 0 giving us 0
+ 3797 × 20 giving us 75940
+ 3797 × 400 that is equal 1518800
+ 3797 × 3000 giving us 11391000

= 12985740
