A metal block of mass \( m \) is suspended from a rigid support through a metal wire of diameter \( 14 \, \text{mm} \). The tensile stress developed in the wire under equilibrium state is \( 7 \times 10^{5} \, \text{N m}^{-2} \). The value of mass \( m \) is _________ \( \text{kg} \). (Take, \( g = 9.8 \, \text{m s}^{-2} \) and \( \pi = \dfrac{22}{7} \))
