If you've ever tried to divide zero by zero on a calculator, you'll get an error or "answer undefined."
So let’s say you ask Siri to work out the math problem for you.
Siri's answer to your question, "What is zero divided by zero?": "Imagine that you have zero cookies and you split them evenly among zero friends. How many cookies does each person get? See? It doesn’t make sense. And Cookie Monster is sad that there are no cookies, and you are sad that you have no friends."
When asked the same question, Alexa's answer is, "Zero divided by zero is undefined."
Here's the video:
https://www.youtube.com/watch?v=mhK0Yg_Wryg