No problem, we've got 5557 and 1621 to multiply
5557 × 1621 = 1621 × (5557)
+ 1621 × 7 that equals 11347
+ 1621 × 50 what gives us 81050
+ 1621 × 500 that equals 810500
+ 1621 × 5000 what gives us 8105000

= 9007897
