No problem, we've got 3944 and 5791 to multiply
3944 × 5791 = 5791 × (3944)
+ 5791 × 4 what gives us 23164
+ 5791 × 40 giving us 231640
+ 5791 × 900 that equals 5211900
+ 5791 × 3000 what gives us 17373000

= 22839704
