table <td rowspan="2"> 2row를, <td colspan="2"> 2column을 차지한다는 얘기

rowspan 사용예제

<table>
  <tr>
    <th>Month</th>
    <th>Savings</th>
    <th>Savings for holiday!</th>
  </tr>
  <tr>
    <td rowspan="2">January</td>
    <td>1</td>
    <td>2</td>
  </tr>
  <tr>
    <td>3</td>
    <td>4</td>
  </tr>
  <tr>
    <td rowspan="2">February</td>
    <td>11</td>
    <td>22</td>
  </tr>
  <tr>
    <td>33</td>
    <td>44</td>
  </tr>
</table>

 

https://www.w3schools.com/tags/tryit.asp?filename=tryhtml_td_rowspan

 

https://www.w3schools.com/tags/tryit.asp?filename=tryhtml_td_colspan