Assuming ideal behaviour, the magnitude of log K for the following reaction at 25$^\circ$C is x $\times$ 10^$-$1. The value of x is ______________. (Integer answer)

$3HC \equiv C{H_{(g)}} \rightleftharpoons {C_6}{H_{6(l)}}$

[Given : ${\Delta _f}{G^o}(HC \equiv CH) = - 2.04 \times {10^5}$ J mol^$-$1 ; ${\Delta _f}{G^o}({C_6}{H_6}) = - 1.24 \times {10^5}$ J mol^$-$1 ; R = 8.314 J K^-1 mol^$-$1]