int a = 3;
 int b = 10;
int c;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.print("c=a+b, c=");
  Serial.println(c=a+b);
  Serial.begin(115200);
  Serial.print("c=a-b, c=");
  Serial.println(c=a-b);
  Serial.begin(115200);
  Serial.print("c=a*b, c=");
  Serial.println(c=a*b);
  Serial.begin(115200);
  Serial.print("c=a/b, c=");
  Serial.println(c=a/b);
  Serial.begin(115200);
  Serial.print("c=a%b, c=");
  Serial.println(c=a%b);
  }
void loop() {
  // put your main code here, to run repeatedly:
  delay(10); // this speeds up the simulation
}