最小包装量

/// <summary>
        /// 计算最小包装数量
        /// </summary>
        /// <param name="qty">订单数量</param>
        /// <param name="minPackagingQty">最小包装数量</param>
        /// <returns></returns>
        public decimal CalcMinPackagingQuantity(decimal minPackagingQty, decimal qty)
        {
            if (qty < minPackagingQty)
            {
                return minPackagingQty;
            }
            else if (qty % minPackagingQty == 0)
            {//刚好是最小包装量的倍数
                return qty;
            }
            else
            { //倍数多1， 计算公式：倍数*最小包装量+最小包装量
                return Math.Floor(qty / minPackagingQty) * minPackagingQty + minPackagingQty;
            }
        }