<?php
$m = 49.03;
   $n = array(0.9, 1.1, 1.9, 1.5, 1.6, 1.4);
   $t = array(21.15, 18.96, 13.58, 11.62, 12.31, 13.64);
   $r = array(0.173, 0.173, 0.173, 0.089, 0.095, 0.103);

   for ($i = 0; $i <= 5; $i++)
   {
           $v = ($n[$i]*2*3.14*$r[$i])/$t[$i];
           echo $v . "<br />";
   }

   echo "<br />";

   for ($i = 0; $i <= 5; $i++)
   {
           $a = $n[$i]/$m;
           printf($a . "<br />");
   }

   echo "<br />";

   echo 3/2.14;
?>