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Thing is, you need to understand first how to reverse engineer C into assembly code. Get to learn what a CPU opcode means, and how to construct logic based on chunks of code. opcodes are instructions the CPU understands. Think of tasks.
How to fit these tasks into a CPU: instructions(opcodes) and raw data. Modern computers follow that model.
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Algebra is used to translate different tasks, like mathematics used to transform an image, into instructions and raw data.
For that, modern computers understand hexadecimal as the universal value. It has 16 real number representations.
The same hexadecimal representation can be expressed as decimal, octal, binary, you name the container.
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The only difference is how much real number representations can a container hold. Binary values can hold only 2 (base 2, 0 and 1) bits. Decimal (base 10, 1 between 10) and hexadecimal (base 16, 0x0 between 0xF). One hex value, like 0xF, is 1111 in binary, or 4 bits. When you deal with raw files, you write everything in a hexadecimal unit, thus, the total of them summed up are the file's raw filesize.
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