How is the market cap calculated of tokens traded on DEX like Pancakeswap?

Question

Let's start with two an example contract 0xD52B599F88A0dD095DD07dd7d98ea965192C3F2a.

If you look at Poocoin or Bogged, both of them show market cap as:

$7,415,949,681,815,443,000,000,000,000,000,000,000,000,000,000,000,000,000

Safe to say that this cannot be true.

What's the formula behind it and how can it be done better?

Answer 1

ERC20 compliant tokens have a function that return the total supply:

 function totalSupply() public view returns (uint256)

The returned value is just informative. The total circulating or minted can be different.