묻고답하기

<table border="0" width="780" heigth="600" align="center" cellspacing="3">
     <tr>
          <td width="80" height="600" rowspan="2" bgcolor="eeeedd" style="padding:7; border-width:1; border-color:rgb(238,238,221); border-style:solid;"><p></P>          </td>
          <td width="150" height="150" bgcolor="#eeeeee" align="right" valign="top" style="padding:7; border-width:1; border-color:rgb(238,238,238); border-style:solid;"><p></p>      </td>
          <td width="150" height="150" bgcolor="eeeedd" style="padding:7; border-width:1; border-color:rgb(238,238,221); border-style:solid;"> </td>
          <td width="400" height="150" bgcolor="eeeecc" style="padding:7; border-width:1; border-color:rgb(238,238,204); border-style:solid;"></td>
     </tr>
     <tr>
          <td colspan="3" align="center" valign="top" bgcolor="white" style="padding:-7; border-width:0; border-color:rgb(240,240,200); border-style:solid;">
                    <table border="0" width="700" height="450" align="center" cellspacing="2">
                          <tr>
                                <td width="450" height="450" rowspan="2" align="left" valign="top" bgcolor="white" style="padding:7; border-width:1; border-color:rgb(240,240,200); border-style:solid;"><? print_bbs("noti", "Notics", "notic", 1, 40)?></td>        
                                <td width="250" height="200" align="left" valign="top" bgcolor="white" style="padding:7; border-width:1; border-color:rgb(240,240,200); border-style:solid;"><? print_bbs("list", "New Tales..", "freeboard", 8, 50)?></td>
                          </tr>
                          <tr>
                                <td align="left" valign="top" bgcolor="white" style="padding:7; border-width:1; border-color:rgb(240,240,200); border-style:solid;"><? print_gallery("list-ga", "Photos", "album", 4, 60, 40, 4) ?></td>
                          </tr>    
                    </table>
            </td>        
      </tr>
</table>

위에 처럼 테이블을 나누고 속에 테이블을 넣었는데요.
속에 있는 테이블의 가로길이가 합하면 700이 나와야 하는데 680정도 밖에 안나오는것 같습니다.
딱 맞추려면 어떻게 해야죠?