//-----------------------------------
uses PT4;
var a,S,P:real;
j:integer;
Procedure Step2(A1:real; var S1,P1:real);
var i,l:integer;
begin
P1:=3*a;
S1:=sqr(a)*sqrt(3)/4;
end;
begin
Task('Proc4');
For j:=1 to 3 do
begin
readln(a);
Step2(A,S,P);
writeln(P,S);
end;
end.