What's the ratio of a pumpkin's circumference to its diameter?

Pumpkin Pi! This pumpkin was spared the fate of becoming pie and instead was dressed up in an Iowa State hat, some glasses, given a hotdog nose, and a 1970s appropriate mustache. This unpublished photo was taken October 29, 1977. If you have any information about this unknown pumpkin carving contest in 1977 contact the Ames Historical Society.