Let $A \mid=\{2,3,4,5, \ldots ., 30\}$ and ${ }^{\prime} \simeq$ ' be an equivalence relation on $\mathrm{A} \times \mathrm{A}$, defined by $(\mathrm{a}, \mathrm{b}) \simeq (\mathrm{c}, \mathrm{d})$, if and only if $\mathrm{ad}=\mathrm{bc}$. Then the number of ordered pairs which satisfy this equivalence relation with ordered pair $(4,3)$ is equal to :
