How to transform milliseconds into seconds .?

Question

I have to transform my Stopwatch "Variable" into seconds ?

Stopwatch czasAlg = new Stopwatch(); 
czasAlg.Start();
//Do semothing
czasAlg.Stop();
Decimal Tn = czasAlg.ElapsedMilliseconds/(decimal)n;

Answer 1

Divide by 1000 or use

czasAlg.Elapsed.TotalSeconds

Answer 2

Without your own constants and magic numbers:

TimeSpan.FromMilliseconds(x).TotalSeconds