37. (5 points)
The figure below is a map of Dodo Island, with the numbers indicating the length of each section of railway. One day, Thomas and Edward set off from Tidmouth Shed in opposite directions, and Gordon also set off from the quarry at the same time. When Thomas and Gordon meet for the first time, Edward has just passed the quarry for the first time; when Thomas and Edward meet for the first time, Gordon has just passed Tidmouth Shed for the first time. Therefore, when Gordon catches up with Edward for the first time, Thomas has traveled $\qquad$ $\mathrm{km}$.
$200$