a. Have you ever heard someone say, It must be right, thats what my calculator told me?

Question:

a. Have you ever heard someone say, “It must be right, that’s what my calculator told me”? Explain why the calculator may or may not have given the correct answer.
b. What is meant by the phrase “Garbage-in, garbage-out!” and how have computers increased the probability that studies might be victimized by the adage?