If I want to link to a community X on a Lemmy instance Y.zzz, I know I should use the link /c/X@Y.zzz, which will redirect to the copy of the instance on the server where the user has the account.

What is the analogous way to link to a post? For example this post has address lemmy.ca/post/1866360 but what link should I give to users on another instance, so that they can see the post in their instance?