Dynamic link

Hi,

I need help with a dynamic link.

So I have a pod which contains two variables: image and a number.

Now I have a page where the images are displayed in a grid, and there each is linked to a detailed page:

<a href="domain.com/detailpage?number={@number}">{@image}</a>

On the detailed page, it calls an iframe, which must have the ID in the link.

<iframe src="otherdomain.com/a/b/c/{@number}">

How can I make sure the number from the link is properly inserted into the iframe?

Thanks!
Astrid