How recursion occurs in the following code

I would like to understand, because I can not mentally glimpse what happens in the excerpt: return fat * factorial.fatorar (fat-1) ;, the question of recursion, regarding the calls of the factorar method itself in relation to multiplication with fat.

public class FatorialRecursiva
{   
   public static void main(String[] args)
   {
       FatorialRecursiva fatorial = new FatorialRecursiva();
       double dado = 5.0;
       dado = fatorial.fatorar(dado);

       System.out.print(dado);
   }

   public double fatorar(double fat)
   {
       if (fat < 2)
       {
           return 1;
       }else
       {
           return fat *  fatorar(fat-1);
       }
   }
}