Ok I found this it looks ok after remove the bold.

1. Position the insertion point where you want the slashed zero to appear.
2. Press Ctrl+F9. Word inserts field braces.
3. Type "eq \o (0,/)". (You should not include the quote marks.)
4. Press Shift+F9. Word collapses your field and the slashed zero appears.

You're done, but I can make it even easier -- instead of going through all those steps every time, add this character to your AutoCorrect list. Do this:

1. Copy the slashed zero.
2. Click the Office button, and then click Word Options.
3. In the Word Options dialog box, click Proofing and click AutoCorrect Options.
4. The slashed zero should already be in the Replace With field. Enter a shortcut, like *0 in the Replace field and click OK.