Double dot on spotlight calculator So I'm playing around with the Spotlight calculator, and came across a weird thing:

If I type

1..1, I receive 0.1
5..6, I receive 3
523..6.1, I receive 31.38

Does anybody know what mathematical function this is?

Edit: This works on macOS Sierra 10.12.2, as for people in the comments, it looks like three dots are required on macOS High Sierra.
What is happening, is the calculator splits the numbers and dots into the following:

5..6=3 turns into 5 * .6 = 3

As we know that . is another way of saying 'multiply' its simply, 5 multiplied by .6

As for 523..6.1=31.38, it turns into 523 * (.6 * .1) = 31.38