How can a View get information from another class?

I am writing a calculator program.

class Main
{
    constructor() 
    {
        this.calculator = new Calculator // here I do my calculations 
        this.view = new View(this.calculator) // <-- watch this
        this.keyboard = new Keyboard // here I have some event listeners and other fun stuff
    }
}

After user clicking on the button, I have to rerender the view. But for this I need to know the result of math operation. I can't call the calculator methods directly in View class, so I passed the calculator object as an argument. Is this normal practice?

Please show me what other ways exist to exchange information between objects?

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