How many oranges make 1 cup of juice?

Excuse me, I was wondering if you could clarify something for me. The paragraph mentions that we're talking about making juice from oranges, but it doesn't specify how many oranges are needed to make exactly 1 cup of juice. Could you please elaborate on that? Is it a fixed number of oranges per cup, or does it vary depending on the size and juiciness of the oranges? And if there is a general guideline, what would that be? I'm trying to plan out a recipe and want to make sure I have enough oranges on hand. Thank you in advance for your help.