Should box-sizing: border-box; be used here, or not?

HTML-CSS
1

The reason why I’m asking is because there is
padding: 25px; added to it.

Is it a good idea here to add box-sizing or not?

Box-sizing Removed
https://jsfiddle.net/wby16ep8/1/

    .container {
      width: 936px;
      padding: 25px;
      margin: 100px auto;
      border-radius: 25px;
      border: 2px solid #0059dd;
      background: #000000;
    }

Box-sizing Added

25 x 2 = 50 + 4 = 54 + 936 = 990
https://jsfiddle.net/wby16ep8/5/

  .container {
      width: 990px;
      padding: 25px;
      margin: 100px auto;
      border-radius: 25px;
      background: #000000;
      border: 2px solid #0059dd;
      box-sizing: border-box;
    }
2

No.

Whether or not you use a border has nothing to do with picking a box model. The hype I saw around the border-box model had to do with people whining about having to do math when figuring out the dimensions of a document or component.

The main drawback that I see with border-box is that when you add too much padding and margin and the content becomes not visible.