This contract has given out ERC20 tokens called VSL. The total supply is said to be 33,390,496.03337560002666059, but if you inspect the contract, that value is stored as a uint256, which means it's value is 33390496033375600026660590. How do you convert a uint256 to get the correct amount issued?
While creating a token, the creator of token specifies the number of decimal places he needs for his token. Since ethereum doesn't fully support decimals, the decimals defined by contact creator defines the smallest unit of the token. For eg, if the decimal place for token say, ABC Coin is 2, this means that the smallest unit of ABC token is 0.01. So in order to send someone 1 ABC coin, you need to send him/her 100 (1*no of Decimals) ABC Tokens.
Now talking about your case of VSL Token. The decimal units of VSL Token is 18. So if the total supply is
33390496033375600026660590, then this means actual supply is
There is a detailed documentation written by me here.