void setup() {
  Serial.begin(9600);
}

void loop() {
  int number = ; //write the number you want the square and cube of
  int square = number * number;
  int cube = number * number * number;
  
  Serial.print("Square of ");
  Serial.print(number);
  Serial.print(" is: ");
  Serial.println(square);
  
  Serial.print("Cube of ");
  Serial.print(number);
  Serial.print(" is: ");
  Serial.println(cube);
  
  delay(5000);  // Delay between calculations
}