No problem, we've got 5723 and 1623 to multiply
5723 × 1623 = 1623 × (5723)
+ 1623 × 3 that is equal 4869
+ 1623 × 20 yielding 32460
+ 1623 × 700 giving us 1136100
+ 1623 × 5000 which equals 8115000

= 9288429
