Yihongyuan [final] Guide

Using the approximation of pi as 3.1415, we obtain:

This calculation demonstrates the mathematical significance of Yihongyuan and its potential connection to the value of pi. However, further research is required to fully understand the historical development and philosophical implications of this enigmatic concept. Yihongyuan [Final]

where r is the radius. Given that the diameter is 1 unit, the radius (r) is 1/2 unit. Using the approximation of pi as 3