Echo [_post_title] in form Submit

Hi,

i had Add New Contact Form as:

<p>Your Name (required)<br />
    [text* your-name] </p>

<p>Your Email (required)<br />
    [email* your-email] </p>

<p>Title Post<br />
    [text your-subject] </p>

<p>Your Message<br />
    [_post_title] </p>

<p>[submit "Send"]</p>

but in page-post echo code [_post_title] not show post-page title

How to echo post-page title in form (don’t use the_title in wordpress code)

and how to echo [_post_title] in value input

<input type="text" name="titel" value="[_post_title]"> : Error Code.

Thanks!

https://www.ads-software.com/plugins/contact-form-7/