Applying liquid section settings to the customizer

[batulkr]

Hello everyone,

I would like to assign the range setting to my customizer in order to control the number of product columns per row. I write the settings properly, but I do not know how to apply them to the right place. No source seems to exist on google about this, or maybe I could not find. 

{
	"type": "range",
	"id": "product_columns",
	"label": "Posts per row",
	"default":4,
	"min":1,
	"max":5,
	"step":1
}

I implemented this setting into my schema, but I do not know how to make it work. Can anyone help with this?

Thanks for any reply in advance!