int PIN_CTRL = 18;
long A = 1023;
long B = 75;
int D;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  pinMode(PIN_CTRL, INPUT);
  long C = A*B;
  Serial.println(A*B);


}

void loop() {
  // put your main code here, to run repeatedly:
   while(Serial.available() == 0) {
  }
  D = Serial.parseInt();
  Serial.print(D);
  
}