Allow nights/days in fixed multiple

Looking for feature where by visitor can book rooms only in fixed multiples
e.g.
Multiple in 3
Visitor has to book room for either 3 or 6 or 9 or 12 or so no......

Multiple in 10
Visitor has to book room for 10 or 20 or 30 and so on........

Such multiple should be users definable.
some may go for 2 or 5 or 6 or 9

Hi,

It has been implemented since Solidres v1.9.3 + Complex Tariff plugin v0.9.0.

Regards,