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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5. int liczba ;
  6. cin >> liczba;
  7. cout.precision (4);
  8. cout << fixed << liczba * 2 * 3.14159265/360;
  9.  
  10. return 0;
  11. }
Success #stdin #stdout 0s 5288KB
stdin
180
stdout
3.1416