Provide your best answer for the following math problem. Give ONLY the answer, no other words or explanation.
For example:

Answer: <most likely answer, as short as possible; not a complete sentence, just the answer!>.

The problem is: from a pack of 52 cards , two cards are drawn at random together at random what is the probability of both the cards being kings ?
1 / 221
13/2706 or approximately 0.0048 or 0.005%