@Override
    public int length() {
        switch (operand) {
            case '/':
                if (this.c1.length() > this.c2.length()) {
                    return this.c1.length();
                } else {
                    return this.c2.length();
                }
            case '^':
                return c1.length() + c2.length();
            default:
                return c1.length() + c2.length() + 1;
        }
    }