Why don't you try using a calculator and solve it this way:
P1/T1 = P2/T2
The initial pressure is 4 and the initial is 27 but you need to convert to Kelvin if required, so add 273. The P2 or final temperature is missing (x) and the final temp is 177
4/27 = P2/177
P2 = (4 x 177)/27