Wie kann ich die Stellen nach dem Komma einstellen?
How can I adjust the digits after the comma?
Not sure what you mean by "adjust"! If you give a mathematical example, then we might be able to help.
Now can I make the number 0.5884 to appear as 0.59
Yes, you can if you only want 2 decimal places. Since your number is 0.5884 and the third digit is > 5, you can round up to the next higher number. So, your answer of 0.59 is correct.