Answer
$186$ KPa
Work Step by Step
As we know that;
$P_2=\frac{P_1V_1T_2}{V_2T_1}$
We plug in the known values to obtain:
$P_2=\frac{266(1.64\times 10^{-2})(300)}{(1.67\times 10^{-2})(273)}=287KPa$
Thus, the gauge reading$=287KPa-101KPa=186$KPa