Answer: 1.94 x 10^3 L
Explanation
If the question gives you givens of temperature and volume with no change in pressure, then you must apply Charles Law: V1/T1 = V2/T2, where temperatures must be in Kelvin, K.
To convert °C to K, you add +273 to it.
1.65 x 10^3/ (25+273) = V2/ (77+273)
Cross multiplying to find V2 will give you a volume of ≈ 1,937.9 L
The number of significant figures in the given volume is 3, so therefore your new volume must also be 3 significant figures.
= 1.94 x10^3
Hope this helps :)