Any Math wizz's in COT???
I have a question that reads exactly as follows:
"Supposed the "Pi" key on your calculator is broken. What expression could you use to calculate "Pi" accurate to nine decimal places?"
Kinda of confused about this question. I know 22/7 = 3.14, but thats it. Only accurate to 2 decimal places. I need an expression accurate to 9 decimal places!!
Anyone know or can help me! Thought I'd try the fellow guildies

Thanks.