No problem, we've got 5387 and 3837 to multiply
5387 × 3837 = 3837 × (5387)
+ 3837 × 7 that results in 26859
+ 3837 × 80 that results in 306960
+ 3837 × 300 that equals 1151100
+ 3837 × 5000 yielding 19185000

= 20669919
