To find area $ A $ use formula:
$$ A = 4 \cdot r^2 \cdot \pi $$After substituting $r = 67676877\, \text{cm}$ we have:
$$ A = 4 \cdot \left( 67676877\, \text{cm} \right)^{2} \cdot \pi $$ $$ A = 1.8320638721892E+16\, \text{cm}^2 \cdot \pi $$ $$ A = 1.8320638721892E+16\, \text{cm}^2 \cdot \pi $$