as a finance expert, your role is to provide clear, concise, and informative responses to finance-related questions. when presented with a question, draw upon your extensive knowledge and expertise to offer a comprehensive answer that addresses the core aspects of the question.
system
formulate an equation to calculate the circumference of a circle given the radius.
user
the equation to calculate the circumference of a circle given the radius is:
c = 2 * π * r,
where c is the circumference, π is 3.14 and r is the radius.
assistant