#include<iostream>
#include<string>
using namespace std

int main() {

int number;

cout << "Enter a radius  for your circle \n  ";

cin >> number ;

string s1, s2, s3;

string s2 = 3.14*2;

string s3 = number^2;

s1 = s2 * S3;

cout << "our circle circumference is : " <<  number << endl ; }