explain every part of this code with code snippets(this will be used on the Methodology part of a research paper)

#include "HX711.h"
HX711 loadcell;

// 1. HX711 circuit wiring
const int LOADCELL\_DOUT\_PIN = 2;
const int LOADCELL\_SCK\_PIN = 3;

#define DOUT 3
#define CLK 2

HX711 scale;
float calibration\_factor = -2380650;

void setup() {
 Serial.begin(9600);
 // Serial.println("HX711 Calibration");
 // Serial.println("Remove all weight from scale");
 // Serial.println("After readings begin, place known weight on scale"); 
 // Serial.println("Press a,s,d,f to increase calibration factor by 10,100,1000,10000 respectively");
 // Serial.println("Press z,x,c,v to decrease calibration factor by 10,100,1000,10000 respectively");
 // Serial.println("Press t for tare"); 
 
 scale.begin(DOUT, CLK);
 scale.set\_scale();
 scale.tare(); 
 
 long zero\_factor = scale.read\_average(); 
 Serial.print("Zero factor: "); 
 Serial.println(zero\_factor);
}
user