Help! How do I answer this? Concentration?

A housekeeper wants to use an ammonia solution to clean a kitchen. The concentration of ammonia (NH₄OH) in a 500 ml bottle is 14 mol/L. The housekeeper needs a solution whose concentration of ammonia is 0,2 mol/L, using a spray bottle with a capacity of 12 L. How much undiluted ammonia should she put in her spray bottle?