var meters = milesTometers(1609.34);

  print(meters);

  var miles = metersTomiles(1);

  print(miles);

}

​

function metersTomiles(meters) {

  var miles = meters * 1609.34;

  return miles;

}

function milesTometers(miles) { 

  var meters = miles * 0.000621371;

  return meters

}