Oh hexadecial AKA 'HEX'... It's all mathematics brotha!
That is number representation using the digits 0-9, with their usual meaning, plus the letters A-F (or a-f) to represent hexadecimal digits with values of (decimal) 10 to 15. The right-most digit counts
ones, the next counts multiples of 16, then 16^2 = 256, etc.
For example, hexadecimal BEAD is decimal 48813:
digit weight value
B = 11 16^3 = 4096 11*4096 = 45056
E = 14 16^2 = 256 14* 256 = 3584
A = 10 16^1 = 16 10* 16 = 160
D = 13 16^0 = 1 13* 1 = 13
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BEAD = 48813
There are many conventions for distinguishing hexadecimal numbers from decimal or other bases in programs. In {C} for example, the prefix "0x" is used, e.g. 0x694A11.
If you need conversion go to start>run> "calc" > view > scientific ... then there will be a HEX button on your windows calculator
Math is a bitch