Codepoint U+00A4 --> hex 0xA4 --> binary 10100100

We need to store 10100100 in the UTF-8 bytes:

110..... 10.....

We distribute 10100100 over the 'points' in the two bytes:

110 00010 10 100100

So U+00A4 in UTF-8 becomes 1100010 10100100 or 0xc2 0xa4.