The gauge pressure in your car tires is 3.00 ✕ 105 N/m2

The gauge pressure in your car tires is 3.00 ✕ 105 N/m2 at a temperature of 35.0°C when you drive it onto a ferry boat to Alaska. What is their gauge pressure later, when their temperature has dropped to -38.0°C?
Assume that their volume has not changed.