No problem, we've got 8423 and 2570 to multiply
8423 × 2570 = 2570 × (8423)
+ 2570 × 3 that is equal 7710
+ 2570 × 20 which equals 51400
+ 2570 × 400 which equals 1028000
+ 2570 × 8000 giving us 20560000

= 21647110
