For a certain reaction at 300 K, K =10, then Δ G^° for the same reaction is - ____ × 10^-1 kJ mol^-1. (Given R =8.314 JK^-1 mol^-1 )

For a certain reaction at $\displaystyle 300 \mathrm{~K}, \mathrm{~K}=10$, then $\displaystyle \Delta \mathrm{G}^{\circ}$ for the same reaction is - $\displaystyle \_\_\_\_$ $\displaystyle \times 10^{-1} \mathrm{~kJ} \mathrm{~mol}^{-1}$. (Given $\displaystyle \mathrm{R}=8.314 \mathrm{JK}^{-1} \mathrm{~mol}^{-1}$ )