A solution is prepared by dissolving 165 g of NaCl in 1000 mL of water. This solution was labeled as a stock solution. Once the solution was prepared, a 200.00 mL sample of the solution was transferred into a 500 mL volumetric flask and diluted to the mark with water. Following this, 125 mL of this solution was transferred to a 200 mL volumetric flask and diluted to the mark with water. What is the concentration of the last solution?