<?php


  echo " Witaj <br> świecie :P ";

  $i=7;
  $i*=5;

   echo " <Br><Br> $i <Br><Br>" ;



   $a=$_GET["a"];
   $b=$_GET["b"];
   $abs=$a+$b;
   $abo=$a-$b;
   $abm=$a*$b;
   $abd=$a/$b;



   echo "$a + $b = $abs <br>   ";
   echo "$a - $b = $abo <br>   ";
   echo "$a * $b = $abm <br>   ";
   echo "$a / $b = $abd <br>   ";

?>