"In response to your question, I have conducted studies on the elliptic curve that allow me to simplify some key encryption calculations. One of these is the calculation of the compressed address of the private key. To compute this, we first determine the decimal representation of the key and then multiply the result by 256. This gives us the decimal number of the private key for the compressed address we are looking for."
5HpHagT65TZzG1PH3CSu63k8DbpvD8s6GJmReYUvFeeoYmkGcfC
Uncompressed: 1LG2ZwyaX8GdofxzBoApa3D9vjjd3iguk9
Dec: 404560468236045398516257
404560468236045398516257 × 256 = 103567479868427622020161792
Dec Compressed : 103567479868427622020161792
KwDiBf89QgGbjEhKnhXJuH7LrciVrZi6EZR5nhxE3fBrTAEyMEVe
1PBVLeJdrLTBVx2j3NqxbPAQ3s8hzLat78
It's even easier: you just shift 8 bits to the left (or add "00" at the end when in HEX).
0x55ab4455677554432221 -> 0x55ab445567755443222100