How do you get so many letters of recommendations?

So I just completed my first semester of college, and I am now applying for internships. I am a aerospace engineer major, and I was only able to a letter of recommendation to one of my internships. But I’m applying to a lot more than one, and I don’t want to ask the same professor like 25 times to write letters of recommendations. I know when I meet my other professors next semester I can try and ask them. Do you guys just have a lot of people to get letters of recommendations from?

Don’t feel bad about asking “the same professor like 25 times to write letters of recommendations,” it’s part of their job! Seriously, my current advisor was just telling me this. It’s trivial for them to write/submit a letter after the first one is already written, because usually what they end up doing is copying the first letter and just tailoring some details.