Confused about true area in Bengaluru flats

Honestly, I'm feeling so confused with all these area calculations for a 3BHK in Bengaluru. Prestige ke projects dekh raha tha near Koramangala/Domlur area. My wife wants a safe neighbourhood for kids' school admission. They quote super area, but carpet area toh bohot kam lagta hai. Is this normal? Matlab, 1800 sqft super area mein 1200 carpet area hi milta hai? How do people actually confirm this before paying? Builders just gloss over it. Should I trust a broker to explain this better, or direct deal karna sahi hai for clearer terms? Thinking about a 3BHK around ₹1.8 Cr. Need advice on how to avoid this 'super area' trap. Kya koi actual hack hai to verify carpet area on site?