JavaScript Loops, Arrays, and Objects: Tracking Multiple Items with Arrays Challenge Task 1 of 2

The challenge instructions state "Create and array named data and store any three numbers in it".

The previous video ended with a walk-through of a simple array to illustrate the syntax. I understood it as follows:

var ___ = {
'__', 
'__', 
'__', 
};

I answered the challenge as follows:

var data = {
  '4',
  '66',
  '987',
};

and received a SyntaxError stating that the commas were incorrect. I tried turning the numbers into strings, using " instead of ', eliminating the ' or " entirely, replacing the , with ; and removing the ; after the closing curly brace. I knew that these changes wouldn't be the correct answer but I was interested in the error I would receive. All errors were the same but replaced the thing causing the error with whatever I had just changed.

Can anyone help me understand what I'm doing wrong here? Thanks.