anyone can help me aboutt his errors in my web?

heres the error

PHP Code:

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Warning:  Division by zero in C:\xampp\htdocs\includes\indrankingtable.php on line 26 


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heres whats line 22

PHP Code:

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echo "<tr class='rank_player'><td>".$n++."</td><td><a href='http://127.0.0.1/charinfo.php?name=".$row[1]."'><font color='#FF8C00'>".$row[1]."</font></a></td><td>".$row[2]."</td><td>".$row[3]."</td><td>".$row[4]."</td><td>".$row[5]."</td><td>".ROUND($row[6]/60/60,0)."</td><td>".ROUND($row[3] / $row[4],2).""; 


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help! :$:


edit:
alos this one

PHP Code:

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Warning: Division by zero in C:\xampp\htdocs\charinfo.php on line 129

Warning: mssql_result() expects parameter 1 to be resource, null given in C:\xampp\htdocs\charinfo.php on line 132

Warning: mssql_result() expects parameter 1 to be resource, null given in C:\xampp\htdocs\charinfo.php on line 133 


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heres what those lines says"

PHP Code:

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         mssql_result($query1, $i, 'Name'),
          mssql_result($query1, $i, 'Level'),
      $gender2,
          mssql_result($query1, $i, 'XP'),
          mssql_result($query1, $i, 'LastTime'),
          mssql_result($query1, $i, 'KillCount'),
          mssql_result($query1, $i, 'DeathCount'),
          ROUND(mssql_result($query1, $i, 'PlayTime')/60/60,0),
          ROUND(mssql_result($query1, $i, 'KillCount') / mssql_result($query1, $i, 'DeathCount'),2),
      mssql_result($query1337, 0, 'warnings'),
      mssql_result($query1338, 0, 'coins'),
          mssql_result($query4, 0, 'Name'),
      mssql_result($query4, 0, 'Name')
        );
}
    echo "<tr><td class='rank_head'><b>Clan Rank:</b></td>";

     $query4 = mssql_query("SELECT       Character.Name, ClanMember.Grade
                            FROM         Character
                            INNER JOIN   ClanMember ON Character.CID = ClanMember.CID
                            WHERE        (ClanMember.CID = '$cid')
                            AND          (Character.DeleteFlag = '0')
                ORDER BY ClanMember.Grade ASC");
      for($i = 0; $i < mssql_num_rows($query4); ++$i)
      {
        $row = mssql_fetch_row($query4); 


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help!! :$: