No problem, we've got 2851 and 3940 to multiply
2851 × 3940 = 3940 × (2851)
+ 3940 × 1 what gives us 3940
+ 3940 × 50 which equals 197000
+ 3940 × 800 that equals 3152000
+ 3940 × 2000 that equals 7880000

= 11232940
