No problem, we've got 3989 and 845 to multiply
3989 × 845 = 845 × (3989)
+ 845 × 9 that results in 7605
+ 845 × 80 which equals 67600
+ 845 × 900 which equals 760500
+ 845 × 3000 giving us 2535000

= 3370705
