No problem, we've got 5305 and 3897 to multiply
5305 × 3897 = 3897 × (5305)
+ 3897 × 5 yielding 19485
+ 3897 × 00 what gives us 0
+ 3897 × 300 resulting in 1169100
+ 3897 × 5000 resulting in 19485000

= 20673585
