No problem, we've got 5384 and 3908 to multiply
5384 × 3908 = 3908 × (5384)
+ 3908 × 4 that is equal 15632
+ 3908 × 80 what gives us 312640
+ 3908 × 300 which equals 1172400
+ 3908 × 5000 yielding 19540000

= 21040672
