No problem, we've got 3943 and 4224 to multiply
3943 × 4224 = 4224 × (3943)
+ 4224 × 3 what gives us 12672
+ 4224 × 40 giving us 168960
+ 4224 × 900 which equals 3801600
+ 4224 × 3000 yielding 12672000

= 16655232
