No problem, we've got 5285 and 4152 to multiply
5285 × 4152 = 4152 × (5285)
+ 4152 × 5 that is equal 20760
+ 4152 × 80 producing 332160
+ 4152 × 200 giving us 830400
+ 4152 × 5000 that is equal 20760000

= 21943320
