void setup() {
Serial.begin(9600);
int a = 666;
int b = 13;

int c = -2;
int d = 1023241323;

Serial.println(a+b);
Serial.println(a-b);
Serial.println(a*b);
Serial.println(a/b);

Serial.println(c+d);
Serial.println(c-d);
Serial.println(c*d);
Serial.println(c/d);
}

void loop() {
  // put your main code here, to run repeatedly:

}