1. How do I get the **0** width to be equal size with 1 and 2
2. **( . )** to be equal width as 3 and **=** to be equal width with +?

I can't drag the white square (When clicking the UI button) to resize them.

Screenshot of my storyboard:

[![Screenshot of my storyboard](https://i.stack.imgur.com/pZtnq.png)](https://i.stack.imgur.com/pZtnq.png)