float multiply(float a, float b, float c) {
    return a * b * c;
}

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

    float num1 = 1.2;
    float num2 = 3.4;
    float num3 = 5.6;

    float result = multiply(num1, num2, num3);
    Serial.print("The result is = ");
    Serial.println(result);
}

void loop() {
}