How to show the correct selected quantity in cart page, mini cart,add to cart page

if we selected a product and add a certain amount of quantity of product the quantity should updated in cart , previously one issue was there if we add 300 as quantity it only showing 1 as quantity so what we selected quantity should update in cart

 getContext: _.wrap(QuantityPricingView.prototype.getContext, function getContext(fn) {
                        var context = fn.apply(this, _.toArray(arguments).slice(1));
                        var self = this;
                        var priceSchedule = [];
                        priceSchedule = self.model.get('microsite_price_detail') || []
                        var pricingSchedule = []
                        if (priceSchedule.length != 0) {
                            pricingSchedule = priceSchedule
                        }
                        else {
                            var pricingSchedule = this.model.get('item').get('onlinecustomerprice_detail').priceschedule || [];
                        }
                        if (pricingSchedule.length != 0) {

                            var quantityAtFirst = pricingSchedule[0].maximumquantity;
                            var quantities = [];
                            var counter = 0;
                            var quantityFromModel = 0;
                            if (pricingSchedule) {
                                if ($("#quantity").val()) {
                                    quantityFromModel = this.model.get('quantity');
                                } else {
                                    this.model.set("quantity", parseInt(quantityAtFirst));
                                }
                            }