The magnetic potential due to a magnetic dipole at a point on its axis situated at a distance of $20 \mathrm{~cm}$ from its center is $1.5 \times 10^{-5} \mathrm{~T} \mathrm{~m}$. The magnetic moment of the dipole is _________ $A \mathrm{~m}^2$. (Given : $\frac{\mu_o}{4 \pi}=10^{-7} \mathrm{Tm} A^{-1}$ )