A 24 yo just gave me her number

I was just at the gym this morning and saw this young woman going push ups. So a bit later I complemented her as it is good to see a woman do good push-ups. She thought it was very nice of me and thanked me a few times.
For once I was just being genuine and no hidden angle. I did notice she was looking me up and down a bit but didn’t really care.
Then just before I left she came over and gave me her number and said give me a call. L