Change input value onclick button - pure javascript or jQuery

Question

I have two buttons and if I click on some button I need to change value in input text and change total price (product price * value of button - 2 or 4 Qty).

I know

Answer 1

My Attempt ( JsFiddle)

Javascript

$(document).ready(function () {
    $('#buttons input[type=button]').on('click', function () {
        var qty = $(this).data('quantity');
        var price = $('#totalPrice').text(); 
        $('#count').val(price * qty);
    });
});

Html

  Product price:$500

Total price: $500



    
    


Total