void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  Serial.println();
}

void loop() {
  // put your main code here, to run repeatedly:
  if(Serial.available()>0)
  {
    String x= Serial.readStringUntil(';');
      String y= Serial.readStringUntil(';');
    x.trim();
    y.trim();
    int a = x.toInt();
    int b = y.toInt();
    Serial.println(x+" * " + y +" = " + (a+b));
  }
}