<?php $sayilar=array("50.2","25","50.8","10"); 
$enbuyuk=max($sayilar); 
$enkucuk=min($sayilar); 
echo "$enkucuk"*"$enbuyuk"; ?>

<?php $sayilar="10"; 
echo "$sayilar"/5; ?>

<?php
$toplam=0;
 
for($i=1; $i<=500;$i++)
{
           if ($i%3==0)
          {
             echo $i."<br>";
             $toplam+=$i;
          }
 
}
echo "Toplam sonucu:".$toplam;
?>