i'm not talking temperature... firstly !!
And secondly, if i ask how to cut a kitchen worktop... you replying - "router and template and straight cut bit... gives you enough to research" is not really an answer is it?
Firstly -0 is used in temperature, you were not specific on the route you wished to take. Which is why I also asked you the square of the figure.
Secondly, that would be suffice for you to research to understand the principles, rather than be blindly guided and learn nothing.