A solid cube of side 1 m is kept at a room temperature of 32^oC. The coefficient of linear thermal expansion of the cube material is 1 × 10^-5 /^oC and the bulk modulus is 200 GPa. If the cube is constrained all around and heated uniformly to 42^oC, then the magnitude of volumetric (mean) stress (in MPa) induced due to heating is _________.