сможте помочь?токой вопросик

public class Calculator {
public static void main(String[] args) {
int number1 = 15;
int number2 = 3;
String operation = "/";

// write your code here

}
}

The task
Create a basic calculator with only 5 operations, add, subtract, multiply, divide two numbers (and find the residue of dividing one by another.​
Variables number1 and number2 contain the numbers to be operated on.​Variable operation contains the operation that needs to be performed on two numbers.
​Write a code that will display the result of the operation.

Output example:

Result: 5
You are not allowed to change the current values of the number1, number2, and operation variables - we will do it on server while checking your code.


public class Calculator {
public static void main(String[] args) {
int number1 = 15;
int number2 = 3;
String operation = "/";


// write your code here
if (operation=="/"){
System.out.println("Result: " + number1/number2);
}
}
}

так на онлайн компиляторе работает но там где я сдал ответ на вопрос(на сайте) не принял ответ