let num1 = prompt("Enter the first number: ");

let num2 = prompt("Enter the second number: ");

let operator = prompt("Enter the operator (+, -, * or /): ");

if (operator === "+") {

let result = parseInt(num1) + parseInt(num2);

alert("The result is: " + result);

} else if (operator === "-") {

let result = parseInt(num1) - parseInt(num2);

alert("The result is: " + result);

} else if (operator === "*") {

let result = parseInt(num1) * parseInt(num2);

alert("The result is: " + result);

} else if (operator === "/") {

let result = parseInt(num1) / parseInt(num2);

alert("The result is: " + result);

} else {

alert("Invalid operator!");

}

Мне на английском удобнее