class Main
{
  static |Float -> Float| combine (Float n1, Float n2)
  {
    return |Float m -> Float| { n1 * n2 * m }
  }

  public static Void main ()
  {
    Float x := 2f
    Float xi := 0.5f
    Float y := 4f
    Float yi := 0.25f
    Float z := x + y
    Float zi := 1 / (x + y)
    echo (combine(x, xi)(0.5f))
    echo (combine(y, yi)(0.5f))
    echo (combine(z, zi)(0.5f))
  }
}