52. To enter the text of "The Lost Castle" into the computer, Xi Xi can finish it in 5 hours. If Wang Wang and Xi Xi work together, they can finish it in 2 hours. Therefore, if Wang Wang were to enter the text of "The Lost Castle" into the computer alone, it would take $\qquad$ hours.

To enter the text of "The Lost Castle" into the computer, Xi Xi can finish it in 5 hours. If Wang Wang and Xi Xi work together, they can finish it in 2 hours. Therefore, if Wang Wang were to enter the text of "The Lost Castle" into the computer alone, it would take $\qquad$ hours.
Reference answer: $3 \frac{1}{3}$