Display degree

Yes, of course Prime works with angles in radians, and that makes perfect sense.

Why not define your angle with the correct unit from the outset, then there won't be any problems with the display:

A unitless numerical value is, of course, interpreted as a value with the (pseudo) unit radiant if it is to be interpreted as an angle.

If you absolutely want to represent it as an angle in degrees, you must multiply the value by pi/180. As you can see this is exactly what the unit "deg" does when its applied to a numeric value

If a numerical value should be seen as quantity in kiloNewton, then simply multiply it by Unit kN. The same applies to angles and degree. Exception to this rule are temperature units because the conversion between Kelvin and °C or °F include not only scaling (multiplication), but also scale shifting (addition).

But if your calculations have yielded a value of 84.11 and it should actually be 84.11°, then this only shows that you forgot to consistently use one of Prime's advantages, namely its ability to handle units.

So instead of retroactively changing the value to degrees, you should check where the negligence occurred beforehand.
Of course if the value simply was read in from a data file like an Excel sheet where no units are supported, you have to multiply the data by the appropriate unit.