C :

#include<stdio.h>

int main()
{
	float a,b,c;
	scanf("%f",&a);
	b=3.14*a*2;
	c=3.14*a*a;
	printf("%.2f %.2f",b,c);
	return 0;
}

C++ :

#include<stdio.h>

int main()
{
	float a,b,c;
	scanf("%f",&a);
	b=a*2*3.14;
	c=a*a*3.14;
	printf("%0.2f %0.2f",b,c);
	return 0;
}

Pascal :

var
r:real;
begin
readln(r);
writeln(r*2*3.14:3:2,' ',r*r*3.14:3:2);

end.