hex bit slicing for smol gas saving

bitPackingAlpha.sol

// Execution Cost: ~25200
// Logic is to divide the packedbits using a hex denomitor that effectively slices out byte sections from it
// ex: In decimal (1024 / 10^2 = 10), since evm works with 32bytes hex, we use a power of 16 here i.e (result / 16^n)

// for hex division slicing

    uint constant eightBytesSlice = 0x10000000000000000;
    uint constant sixteenBytesSlice = 0x100000000000000000000000000000000;
    uint constant twentyfourBytesSlice = 0x1000000000000000000000000000000000000000000000000;


   function gradeStudentResultBigMagicSlice(address _student) external view returns(uint _datda, uint _potions, uint _transfigurations, uint _comc) {
        uint256 resultBitMagic = bitMagicResults[_student];
        _datda = resultBitMagic & SINGLE_SUBJECT_MASK;
        _potions = (resultBitMagic / eightBytesSlice) & SINGLE_SUBJECT_MASK;
        _transfigurations = (resultBitMagic / sixteenBytesSlice) & SINGLE_SUBJECT_MASK;
        _comc = (resultBitMagic / twentyfourBytesSlice);
    }