C=3.14 • d
3.14 is pi as a number but it’s non ending :3
D is diameter
C is circumference
Since it said the product of pi and diameter it means d or diameter times pi is c or circumference.
So if
D= i don’t n know maybe 5 find what’s c or te circumference.
So 5 multiplyed by pi or 3.14 is your circumference!
If u need help with the problem please don’t hesitate to ask me! And am purely her to help!!! :3