A skipjack tuna (Katsuwonus pelamis) relies on a highly efficient gas exchange system. The total number of secondary lamellae across its gill filaments is estimated to be 4.5 × 107.
The combined surface area of a sample of 2.5 × 104 of these secondary lamellae is 8.4 cm2.
Calculate the total surface area of the tuna's gills. Give your answer in square metres (m2\text{m}^2m2).
