No problem, we've got 5381 and 3826 to multiply
5381 × 3826 = 3826 × (5381)
+ 3826 × 1 resulting in 3826
+ 3826 × 80 what gives us 306080
+ 3826 × 300 which equals 1147800
+ 3826 × 5000 giving us 19130000

= 20587706
