Product card 1 - User selects a product and enters 10 in the quantity field. How can I using code make the second product card automatically show 10 in the quantity field.

I am trying to do something like this

Card 1 code

$('#product_269cx0k4ku_qty').val()

Card 2 code

$('#product_16t8e6dwkn_qty').val()

I tried     $('#product_16t8e6dwkn_qty').val(), = $('#product_269cx0k4ku_qty').val()

Don't laugh, no it did not work, worth a try

Any brainy people out there that can help - thanks Carlton