下列代码的运行结果是：(     )

class SimpleCalc {
    public int value;
    public void calculate() {value += 7; }
}
public class MultiCalc extends SimpleCalc {
    public void calculate() { value -= 3;}
    public void calculate(int multiplier) {
        calculate();
        super.calculate();
        value *= multiplier; 
    }
    public static void main(String[] args) {
        MultiCalc calculator = new MultiCalc();
        calculator.calculate(2);
        System.out.println("Value is: " + calculator.value); 
    }
}