void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  int a = 10;
  int b = 5;

  int sum = a + b;
  int difference = a - b;
  int product = a * b;
  int quotient = a / b;

  Serial.println("Sum: %d", sum);
  Serial.println("Sum: %d", sum);
  Serial.println("Sum: %d", sum);
  Serial.println("Sum: %d", sum);
}

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

}