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