No problem, we've got 5621 and 9910 to multiply
5621 × 9910 = 9910 × (5621)
+ 9910 × 1 giving us 9910
+ 9910 × 20 what gives us 198200
+ 9910 × 600 what gives us 5946000
+ 9910 × 5000 yielding 49550000

= 55704110
