No problem, we've got 5139 and 4033 to multiply
5139 × 4033 = 4033 × (5139)
+ 4033 × 9 what gives us 36297
+ 4033 × 30 producing 120990
+ 4033 × 100 which equals 403300
+ 4033 × 5000 which equals 20165000

= 20725587
