No problem, we've got 4557 and 3980 to multiply
4557 × 3980 = 3980 × (4557)
+ 3980 × 7 what gives us 27860
+ 3980 × 50 producing 199000
+ 3980 × 500 yielding 1990000
+ 3980 × 4000 that results in 15920000

= 18136860
