Please read the following table in HTML format from a webpage and then answer the question in detail according to the table. Each table cell is defined by a <td> and a </td> tag. Each table row starts with a <tr> and ends with a </tr> tag. 'rowspan=m' and 'colspan=n' represents a cell spaning over 'm' rows and 'n' columns.

Webpage title:
Fluid ounce
Table title:
Definitions and equivalences
Table:
<table id='hittask' contenteditable='False'>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 1 imperial fluid ounce </td><td colspan=1 rowspan=1 > = </td><td colspan=1 rowspan=1 > ​1⁄160 </td><td colspan=1 rowspan=1 > imperial gallon </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > = </td><td colspan=1 rowspan=1 > ​1⁄40 </td><td colspan=1 rowspan=1 > imperial quart </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > = </td><td colspan=1 rowspan=1 > ​1⁄20 </td><td colspan=1 rowspan=1 > imperial pint </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > = </td><td colspan=1 rowspan=1 > ​1⁄10 </td><td colspan=1 rowspan=1 > imperial cup </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > = </td><td colspan=1 rowspan=1 > ​1⁄5 </td><td colspan=1 rowspan=1 > imperial gill </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > = </td><td colspan=1 rowspan=1 > 8 </td><td colspan=1 rowspan=1 > imperial fluid drams </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > = </td><td class="highlighted"  colspan=1 rowspan=1 > 28.4130625 </td><td class="highlighted"  colspan=1 rowspan=1 > millilitres </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > ≈ </td><td colspan=1 rowspan=1 > 1.733871455 </td><td colspan=1 rowspan=1 > cubic inches </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > ≈ </td><td colspan=1 rowspan=1 > 0.960759940 </td><td colspan=1 rowspan=1 > US fluid ounces </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > ≈ </td><td colspan=2 rowspan=1 > the volume of 1 avoirdupois ounce of water </td></tr>
</table>
Question:
How much is an imperial fluid ounce in ml?
Answer:
The imperial fluid ounce is exactly 28.4130625 ml.