17. (5 points)
As shown in the figure, there is a circular path and two straight paths on the Green Green Grassland. The two straight paths both pass through the center of the circle, with a radius of 50 meters. Village Chief Slow Sheep starts from point A and walks along the path. He needs to walk through all the paths and return to point A. He needs to walk at least $\qquad$ meters. (Take $\pi$ as 3.14)
$671$