No problem, we've got 3993 and 6308 to multiply
3993 × 6308 = 6308 × (3993)
+ 6308 × 3 that is equal 18924
+ 6308 × 90 what gives us 567720
+ 6308 × 900 yielding 5677200
+ 6308 × 3000 which equals 18924000

= 25187844
