Method chaining for numbers without polluting prototype

number-method-chaining.js

function MyNumber(n) {
    var internal = Number(n);

    this.multiply = function(n) {
        return internal * n
    }

    this.divide = function(n) {
        return internal / n
    }

    this.subtract = function(n) {
        return internal - n
    }

    this.add = function(n) {
        return internal + n
    }
}

const operation = (n) => {
    return new MyNumber(n)
}

const result = operation(10)
    .multiply(2)
    .divide(10)
    .subtract(3)
    .add(10)
    .divide(2)

console.log(result) // 4.5