Conditional variance ratio for bivariate normal

Let $(X,Y)$ have a bivariate normal distribution with $E(X) = E(Y) = 0$. Denote the conditional variance of $X$ given $Y = 1$ by $\operatorname{Var}(X|Y = 1)$ and the conditional variance of $Y$ given $X = 2$ by $\operatorname{Var}(Y|X = 2)$. If $\frac{E(Y|X=2)}{E(X|Y=1)} = 8$ then $\frac{\operatorname{Var}(Y|X=2)}{\operatorname{Var}(X|Y=1)}$ equals ________ (in integer).