No problem, we've got 4504 and 4571 to multiply
4504 × 4571 = 4571 × (4504)
+ 4571 × 4 what gives us 18284
+ 4571 × 00 which equals 0
+ 4571 × 500 which equals 2285500
+ 4571 × 4000 which equals 18284000

= 20587784
