No problem, we've got 5039 and 2663 to multiply
5039 × 2663 = 2663 × (5039)
+ 2663 × 9 what gives us 23967
+ 2663 × 30 that equals 79890
+ 2663 × 000 that equals 0
+ 2663 × 5000 yielding 13315000

= 13418857
