In the voltage reference circuit shown in the figure, the op-amp is ideal and the transistors $Q_1$, $Q_2$,.....,$Q_{32}$ are identical in all respects and have infinitely large values of common-emitter current gain (β). The collector current $(Ic)$ of the transistors is related to their base-emitter voltage ($V_{BE}$) by the relation $I_c$ = $I_s$ exp ($V_{BE}$/$V_T$), where $I_s$ is the saturation current. Assume that the voltage $V_p$ shown in the figure is 0.7 V and the thermal voltage $V_T$ = 26 mV.
The output voltage $V_{out}$ (in volts) is ______________