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Calculator.java

public class Calculator() {
  public Calculator(){

  }
  public int add(int a, int b){
    return a + b;
  }
  public int subtract(int a, int b){
    return a - b;
  }
  public int multiply(int a, int b){
    return a * b;
  }
  public int divide(int a, int b){
    return a / b;
  }
  public int modulo(int a, int b){
    return a % b;
  }
public static void main(String[] args){
  Calculator myCalculator = new Calculator();
  System.out.println(myCalculator.add(5, 7));
  }
}