Error issues. I'm sure it's something simple but I'm about to throw my monitor. :D

<?php
  // number in pounds we want to convert to kilograms
$pounds = 140;
  // floating point value for the pound to kilogram conversion
$lb_to_kg = 0.453592;
  // use variables above to calculate pounds multiplied by the kilogram conversion
$kilograms = $pounds * $lb_to_kg;
  // display the punds to kilograms
echo "Weight: ";
echo $pounds;
echo " lb = ";
echo $kilograms;
echo " kg"

  // number in miles we want to convert to kilometers
$miles = 2.5;
  //floating point value for the mile to kilometer conversion
$mile_to_km = 1.60934;
  // use the variable above to calculate miles multiplied by the kilometer conversion
$kilometers = $miles * $mile_to_km;
  // display the miles to kilometers
echo "Distance: ";
echo $miles;
echo " miles = ";
echo $kilometers;
echo " km";
?>