WordPress.com sites don’t allow users to import custom code into a blog post, so you will need to publish your blog posts differently.
Use Storytailor’s Collage or Batch modules to export appropriately-sized JPG files (check your blog’s settings for column width) to your computer. Then, in WordPress, create a new blog post. Compose your text copy to your new blog post and then upload your JPG files. When ready, publish your blog post.