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public class SimpleCalculator {
    
    private double firstNumber;
    private double secondNumber;
    
    public double getFirstNumber(){
        return this.firstNumber;
    }
    
    public double getSecondNumber() {
        return this.secondNumber;
    }
    
    public void setFirstNumber(double firstNum) {
        this.firstNumber = firstNum;
    }
    
    public void setSecondNumber(double secondNum) {
        this.secondNumber = secondNum;
    }
    
    public double getAdditionResult() {
        return this.firstNumber + this.secondNumber;
    }
    
    public double getSubtractionResult() {
        return this.firstNumber - this.secondNumber;
    }
    
    public double getMultiplicationResult() {
        return this.firstNumber * this.secondNumber;
    }
    
    public double getDivisionResult() {
        if(this.secondNumber == 0) {
            return 0;
        } else {
            return this.firstNumber / this.secondNumber;
        }
    }
    
}