U r gven all 6% saltsolution & wter u cld want & u are ask 2mke up exctly 400 militersof1.5% salutn.how wld u?

you are given all the 6% salt solution and pure water you could want and you are asked to make up exactly 400 milliliters of a 1.5% sal solution. explain how you would do this. help please