No problem, we've got 4395 and 2920 to multiply
4395 × 2920 = 2920 × (4395)
+ 2920 × 5 that is equal 14600
+ 2920 × 90 that equals 262800
+ 2920 × 300 that is equal 876000
+ 2920 × 4000 that equals 11680000

= 12833400
