No problem, we've got 5145 and 4034 to multiply
5145 × 4034 = 4034 × (5145)
+ 4034 × 5 that is equal 20170
+ 4034 × 40 what gives us 161360
+ 4034 × 100 which equals 403400
+ 4034 × 5000 yielding 20170000

= 20754930
