Program Begin7;
Var
L, S, R: Real;
Begin
ReadLn(R);
WriteLn('L = ', 2 * pi * R:6:3);
WriteLn('S = ', pi * Sqr(R):6:3);
ReadLn;
End.
Program Begin7;
Var
L, S, R: Real;
Begin
ReadLn(R);
WriteLn('L = ', 2 * pi * R:6:3);
WriteLn('S = ', pi * Sqr(R):6:3);
ReadLn;
End.