LM386 amp. Simple question. Feedback resistor

[Dormammu]

Are you sure that ANY resistor is suitable for this? Even more than 100k, for example?

Yes, *any* resistor

Will be it suitable for this case?
1.35||100=1.332
1.332+0.15=1.482k
30/1.5+1 =21 (no resistor)
30/1.482+1=21.24 (with resistor)
Not too much increase of gain above x21.