Given, for $ Sn^{4+}/Sn^{2+} $ , standard reduction potential is $ 0.15 \,V $ and for $ Au^{3+}/Au $ , standard reduction potential is $ 1.5\, V $ . For the reaction, $ {3Sn^{2+} + 2Au^{3+} -> 3Sn^{4+} + 2Au } $ , the value of $ E^{\circ}_{cell} $ is,