How to calculate capital gains liability on selling different floors of an inherited house

I’m 62 years old and retired from a bank manager post in August 2023. Here’s my situation: my parents purchased a residential built-up property of 149.10 sq. meters in East Delhi in July 1996 for ₹4.96 lakh. After their passing, I inherited it through registration deed, will, and mutation in February 2020. The 2001 valuation is ₹38.45 lakh.