No problem, we've got 3891 and 845 to multiply
3891 × 845 = 845 × (3891)
+ 845 × 1 giving us 845
+ 845 × 90 which equals 76050
+ 845 × 800 that results in 676000
+ 845 × 3000 what gives us 2535000

= 3287895
