Is 306 square millimeters as big as The Principality Stadium?
It's about 0.000000008 times as big as The Principality Stadium
The size of The Principality Stadium is about 40,000,000,000 square millimeters.
(a.k.a. Stadiwm Principality, f.k.a. Millennium Stadium, f.k.a. Stadiwm y Mileniwm) (Cardiff, Wales, United Kingdom) (total footprint)
The 70,000-person-plus capacity stadium of Cardiff, Principality Stadium has a total footprint of 40,000,000,000 square millimeters. Over 40,000 tonnes of concrete and steel during the construction of the stadium.
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