Cores, threads and sockets: what does it mean the calculation $T = tcs$ and the number on windows task manager performance?

Well, suppose then we have an CPU system such as:

Thread(s) per core $ \equiv t$ : 4

Core(s) per socket $ \equiv c$ : 4

Socket(s) $ \equiv s$ : 1

Then, we must to perform a simple calculation such as: $ 4 \cdot 4 \cdot 1 = 16 $

Therefore, in general we have:

$ $ T = t\cdot c \cdot s \tag{1}$ $

I guess that the equation $ (1)$ gives you then the total number of threads which your system can handle simultaneously.

On the other hand, consider the figure, of windows task manager, in the following:

enter image description here

In the red box we clearly see the number of "Threads". So I would like to know:

What is the difference between the number given by formula $ (1)$ and the number given by windows task manager?