No problem, we've got 5181 and 4093 to multiply
5181 × 4093 = 4093 × (5181)
+ 4093 × 1 that is equal 4093
+ 4093 × 80 which equals 327440
+ 4093 × 100 producing 409300
+ 4093 × 5000 what gives us 20465000

= 21205833
