distance between 2 places | WordPress.org

Hello;
A question stuck in my head, actually I am logical, but I will succeed with this logic.

Now I am trying to calculate distance measurement between 3 places.

I created 2 dropdown fields. There are the same 3 places in both dropdowns.
1) 1st Place
2) 2nd Place
3) 3nd Place
shaped;

I found a method to write the distances between these 3 places in the result, but I think I’m making a small mistake..

(function() {
	var mesafe;
     var s1 = fieldname29;
     var s2 = fieldname30;
     var mesafe = aMesafe[s1][s2];

var aMesafe = [
[0,150,170],
[160,0,150],
[170,160,0],
];


    jQuery('#calculation-mesafe').html(mesafe);
    jQuery('.criter3-one').html('Mesafe: ');
    jQuery('.criter3-two').html(mesafe);

    return mesafe;
  })();

The code is exactly what it should do;
If s1 is selected;

If the 2nd value in the 1st dropdown field is selected
[160,0,150], this part will take into account..

If the 1st value in the 2nd dropdown field is selected
[0,150,170], this part will be considered

This is actually a calculation method between cities.. I couldn’t get it to work..

I’m leaving a codepen link for you, it’s a working Java version.

Where am I making a mistake in the coding part in this plugin..

Thanks a lot..

Codepen Link