It's a reference to the book "A Hitchhiker's Guide to the Galaxy" by Douglas Adams. In the book it has no rational explanation. They constructed an enormously powerful computer to answer the question "What is the meaning of life?" After 10,000 years of computing the computer calculated that the answer was 42. The whole five-book series is mostly nonsense like this. It's a delightful read if you like off-the-wall humor. I'd compare it to Monty Python in novel form.