Rs means rupees, specifically Indian rupees in this case, which has the symbol ₹ and code INR. (Other countries have rupees as well, but that symbol is specifically for Indian rupees.)
But that's the definition, and every calculator's "engineering" mode shows it exactly like that, too. And usually you learn in middle school how to interpret that.
Here’s a photo with the calculator I used in middle school, showing exactly the specified number:
I can see how it’s not obvious if you never learnt it, but especially in when working with the SI it’s incredibly useful and makes many hidden relationships quickly obvious.
