JSFiddle - React, Tailwind, and code Playground

HTML

<table border="true">
			<tr>
				<td colspan=2>2 cols</td>
                <td colspan=18>18 cols</td>
			</tr>
			<tr>
                <td colspan=2>2 cols</td>
                <td colspan=18>18 cols</td>
           </tr>
		<tr>
			<td colspan=6>6 cols</td>
			<td colspan=2>2 cols</td>
			<td colspan=6>6 cols</td>
			<td colspan=6>6 cols</td>
		</tr>
		<tr>
			<td colspan=6>6 cols</td>
			<td colspan=2>2 cols</td>
			<td colspan=6>6 cols</td>
			<td colspan=6>6 cols</td>
		</tr>
		<tr>
			<td colspan=6>6 cols</td>
			<td colspan=2>2 cols</td>
			<td colspan=6>6 cols</td>
			<td colspan=6>6 cols</td>
		</tr>
		<tr>
            <td>1</td>
            <td>2</td>
            <td>3</td>
            <td>4</td>
            <td>5</td>
            <td>6</td>
            <td>7</td>
            <td>8</td>
            <td>9</td>
            <td>10</td>
            <td>11</td>
            <td>12</td>
            <td>13</td>
            <td>14</td>
            <td>15</td>
            <td>16</td>
            <td>17</td>
            <td>18</td>
            <td>19</td>
            <td>20</td>
    </tr>
	</table>

CSS

table{
    width:100%;
    table-layout:fixed;
}