Placing 8 objects on stage in a circle

Hi,

Need some help placing 8 150X150 circles on stage at equidistant locations around a larger circle (644X644, line width 4, centered on stage). Stage is 750X750.

This is not dynamically drawn in runtime. Simply getting the correct coordinates for the 8 circle objects to place them around the 644X644 circle.

Have tried to do it with snapping, grid, by rough estimate, all with poor results. There must be a better way to determine the correct coordinates.

Any help appreciated.

Regards,