Can anyone tell me the steps to finding the volume of a cone? like, step one, do this, step two, do that?

The formula for the volume of a cone is 
V=π r^2 h/3

So suppose the radius of this particular cone is 3 and the height is 9( height refers to the length of the cone from the tip to the middle of the base below)

Then plug in numbers to our formula

V= π*3^2*(9/3)
V=π*9*3
V=27π
V=84.8 (approximately)

Hopefully this helps :)