No problem, we've got 4321 and 5250 to multiply
4321 × 5250 = 5250 × (4321)
+ 5250 × 1 that equals 5250
+ 5250 × 20 what gives us 105000
+ 5250 × 300 resulting in 1575000
+ 5250 × 4000 yielding 21000000

= 22685250
