Exactly @gnorwalt
Basically…
180° = 3.14159rad = pi
So, 360° = 2*pi (a full circle or loop)
The multiplication amount in this case will donate the speed of the loop animation,
the higher the multiplier the faster the loop animation.
4*pi is twice the speed of 2*pi for example.
Check out the free pdf download – How Pi Makes a Looping Animation in Blender
