I translated it so I could help, but please try putting the question in English.
You are supposed to use charles' law here. V1/T1 = V2/T2. Temps should be converted to kelvin, so K = C + 273. You are finding V2, so solving for V2 makes it V1*T2/T1 = 0.5 * 313/293 = 0.534 liters