Well, that falls in the category of "yes it would go fast but no, I'm not sure you'd want to trust it."
LLMs aren't great at answering questions that involve precise math. What you might do instead is ask Marvin (or ChatGPT, or your LLM of choice) to write the source code you need to compute the CI, and then execute that directly if you accept it.
However, AI functions (and all Marvin bots) can use plugins to solve more complex problems. Another option would be to write a function that computes CIs and make it available to the AI as a plugin.