The rod given in the figure is made of two different materials. Both have square cross-section of side 3mm. The resistivity of the first material is $4\mathrm{x}{10}^{-3}\mathrm{\Omega }-\mathrm{m}$ and it is 25cm long while that of the second material is $5\mathrm{x}{10}^{-3}\mathrm{\Omega }-\mathrm{m}$ and is of length 70cm. The equivalent resistivity of the rod between its ends is __________$\times {10}^{-3}\mathrm{\Omega }-m$(roundoff to nearest integer)