#include <stdio.h> 



int main(void)
{
  int miles = 26;    
  int yards = 385;   
  double kilometers; 

  
  int a = 8/4; 
  

    
  kilometers = (miles + (double)yards / 1760) * 1.609;

    
  printf("A marathon /*is*/ %f kilometers\n", kilometers);

  return 0;
}