var
r: integer;
l, s: real;
begin
writeln('vvedite radius okruznosty');
readln(r);
l := 2 * 3.14 * r;
s := 3.14 * r * r;
writeln('Dlina okruznosti ravna: ', l);
writeln('Ploshad kruga ravna: ', s);
writeln;
readln;
end.
var
r: integer;
l, s: real;
begin
writeln('vvedite radius okruznosty');
readln(r);
l := 2 * 3.14 * r;
s := 3.14 * r * r;
writeln('Dlina okruznosti ravna: ', l);
writeln('Ploshad kruga ravna: ', s);
writeln;
readln;
end.