No problem, we've got 5642 and 3420 to multiply
5642 × 3420 = 3420 × (5642)
+ 3420 × 2 what gives us 6840
+ 3420 × 40 what gives us 136800
+ 3420 × 600 yielding 2052000
+ 3420 × 5000 that results in 17100000

= 19295640
