No problem, we've got 5010 and 4223 to multiply
5010 × 4223 = 4223 × (5010)
+ 4223 × 0 producing 0
+ 4223 × 10 producing 42230
+ 4223 × 000 what gives us 0
+ 4223 × 5000 yielding 21115000

= 21157230
