No problem, we've got 4023 and 6519 to multiply
4023 × 6519 = 6519 × (4023)
+ 6519 × 3 that is equal 19557
+ 6519 × 20 yielding 130380
+ 6519 × 000 that is equal 0
+ 6519 × 4000 which equals 26076000

= 26225937
