PROGRAM CalculateN; Var a: real;
Function XfuncN(x: real; n: integer): real; Var c: real; begin c := 0.0; if n=0 then XfuncN := 1.0 else XfuncN := x*XfuncN(x, n-1); end;
begin WriteLn(XfuncN(3.0, 3):0:1); end.